feat: migrate from Cedar to SpiceDB authorization system

This is a major architectural change that replaces the Cedar policy-based
authorization system with SpiceDB's relation-based authorization.

Key changes:

- Migrate from Rust to Go implementation
- Replace Cedar policies with SpiceDB schema and relationships
- Switch from envoy `ext_authz` with Cedar to SpiceDB permission checks
- Update build system and dependencies for Go ecosystem
- Maintain Envoy integration for external authorization

This change enables more flexible permission modeling through SpiceDB's
Google Zanzibar inspired relation-based system, supporting complex
hierarchical permissions that were difficult to express in Cedar.

Breaking change: Existing Cedar policies and Rust-based configuration
will no longer work and need to be migrated to SpiceDB schema.

1 files changed, 0 insertions, 414 deletions

diff --git a/vendor/rustix/src/backend/linux_raw/arch/powerpc.rs b/vendor/rustix/src/backend/linux_raw/arch/powerpc.rs
deleted file mode 100644
index 481b49f4..00000000
--- a/vendor/rustix/src/backend/linux_raw/arch/powerpc.rs
+++ /dev/null
@@ -1,414 +0,0 @@
-//! powerpc Linux system calls.
-//!
-//! On powerpc, Linux indicates success or failure using `cr0.SO` rather
-//! than by returning a negative error code as most other architectures do. In
-//! theory we could immediately translate this into a `Result`, and it'd save a
-//! few branches. And in theory we could have specialized sequences for use
-//! with syscalls that are known to never fail. However, those would require
-//! more extensive changes in rustix's platform-independent code. For now, we
-//! check the flag and negate the error value to make PowerPC look like other
-//! architectures.
-
-use crate::backend::reg::{
-    ArgReg, FromAsm, RetReg, SyscallNumber, ToAsm, A0, A1, A2, A3, A4, A5, R0,
-};
-use core::arch::asm;
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall0_readonly(nr: SyscallNumber<'_>) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        lateout("r3") r0,
-        lateout("r4") _,
-        lateout("r5") _,
-        lateout("r6") _,
-        lateout("r7") _,
-        lateout("r8") _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags, readonly)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall1(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        lateout("r4") _,
-        lateout("r5") _,
-        lateout("r6") _,
-        lateout("r7") _,
-        lateout("r8") _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall1_readonly(
-    nr: SyscallNumber<'_>,
-    a0: ArgReg<'_, A0>,
-) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        lateout("r4") _,
-        lateout("r5") _,
-        lateout("r6") _,
-        lateout("r7") _,
-        lateout("r8") _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags, readonly)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall1_noreturn(nr: SyscallNumber<'_>, a0: ArgReg<'_, A0>) -> ! {
-    asm!(
-        "sc",
-        "trap",
-        in("r0") nr.to_asm(),
-        in("r3") a0.to_asm(),
-        options(nostack, noreturn)
-    )
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall2(
-    nr: SyscallNumber<'_>,
-    a0: ArgReg<'_, A0>,
-    a1: ArgReg<'_, A1>,
-) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        inlateout("r4") a1.to_asm() => _,
-        lateout("r5") _,
-        lateout("r6") _,
-        lateout("r7") _,
-        lateout("r8") _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall2_readonly(
-    nr: SyscallNumber<'_>,
-    a0: ArgReg<'_, A0>,
-    a1: ArgReg<'_, A1>,
-) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        inlateout("r4") a1.to_asm() => _,
-        lateout("r5") _,
-        lateout("r6") _,
-        lateout("r7") _,
-        lateout("r8") _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags, readonly)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall3(
-    nr: SyscallNumber<'_>,
-    a0: ArgReg<'_, A0>,
-    a1: ArgReg<'_, A1>,
-    a2: ArgReg<'_, A2>,
-) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        inlateout("r4") a1.to_asm() => _,
-        inlateout("r5") a2.to_asm() => _,
-        lateout("r6") _,
-        lateout("r7") _,
-        lateout("r8") _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall3_readonly(
-    nr: SyscallNumber<'_>,
-    a0: ArgReg<'_, A0>,
-    a1: ArgReg<'_, A1>,
-    a2: ArgReg<'_, A2>,
-) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        inlateout("r4") a1.to_asm() => _,
-        inlateout("r5") a2.to_asm() => _,
-        lateout("r6") _,
-        lateout("r7") _,
-        lateout("r8") _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags, readonly)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall4(
-    nr: SyscallNumber<'_>,
-    a0: ArgReg<'_, A0>,
-    a1: ArgReg<'_, A1>,
-    a2: ArgReg<'_, A2>,
-    a3: ArgReg<'_, A3>,
-) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        inlateout("r4") a1.to_asm() => _,
-        inlateout("r5") a2.to_asm() => _,
-        inlateout("r6") a3.to_asm() => _,
-        lateout("r7") _,
-        lateout("r8") _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall4_readonly(
-    nr: SyscallNumber<'_>,
-    a0: ArgReg<'_, A0>,
-    a1: ArgReg<'_, A1>,
-    a2: ArgReg<'_, A2>,
-    a3: ArgReg<'_, A3>,
-) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        inlateout("r4") a1.to_asm() => _,
-        inlateout("r5") a2.to_asm() => _,
-        inlateout("r6") a3.to_asm() => _,
-        lateout("r7") _,
-        lateout("r8") _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags, readonly)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall5(
-    nr: SyscallNumber<'_>,
-    a0: ArgReg<'_, A0>,
-    a1: ArgReg<'_, A1>,
-    a2: ArgReg<'_, A2>,
-    a3: ArgReg<'_, A3>,
-    a4: ArgReg<'_, A4>,
-) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        inlateout("r4") a1.to_asm() => _,
-        inlateout("r5") a2.to_asm() => _,
-        inlateout("r6") a3.to_asm() => _,
-        inlateout("r7") a4.to_asm() => _,
-        lateout("r8") _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall5_readonly(
-    nr: SyscallNumber<'_>,
-    a0: ArgReg<'_, A0>,
-    a1: ArgReg<'_, A1>,
-    a2: ArgReg<'_, A2>,
-    a3: ArgReg<'_, A3>,
-    a4: ArgReg<'_, A4>,
-) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        inlateout("r4") a1.to_asm() => _,
-        inlateout("r5") a2.to_asm() => _,
-        inlateout("r6") a3.to_asm() => _,
-        inlateout("r7") a4.to_asm() => _,
-        lateout("r8") _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags, readonly)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall6(
-    nr: SyscallNumber<'_>,
-    a0: ArgReg<'_, A0>,
-    a1: ArgReg<'_, A1>,
-    a2: ArgReg<'_, A2>,
-    a3: ArgReg<'_, A3>,
-    a4: ArgReg<'_, A4>,
-    a5: ArgReg<'_, A5>,
-) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        inlateout("r4") a1.to_asm() => _,
-        inlateout("r5") a2.to_asm() => _,
-        inlateout("r6") a3.to_asm() => _,
-        inlateout("r7") a4.to_asm() => _,
-        inlateout("r8") a5.to_asm() => _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags)
-    );
-    FromAsm::from_asm(r0)
-}
-
-#[inline]
-pub(in crate::backend) unsafe fn syscall6_readonly(
-    nr: SyscallNumber<'_>,
-    a0: ArgReg<'_, A0>,
-    a1: ArgReg<'_, A1>,
-    a2: ArgReg<'_, A2>,
-    a3: ArgReg<'_, A3>,
-    a4: ArgReg<'_, A4>,
-    a5: ArgReg<'_, A5>,
-) -> RetReg<R0> {
-    let r0;
-    asm!(
-        "sc",
-        "bns 0f",
-        "neg 3, 3",
-        "0:",
-        inlateout("r0") nr.to_asm() => _,
-        inlateout("r3") a0.to_asm() => r0,
-        inlateout("r4") a1.to_asm() => _,
-        inlateout("r5") a2.to_asm() => _,
-        inlateout("r6") a3.to_asm() => _,
-        inlateout("r7") a4.to_asm() => _,
-        inlateout("r8") a5.to_asm() => _,
-        lateout("r9") _,
-        lateout("r10") _,
-        lateout("r11") _,
-        lateout("r12") _,
-        lateout("cr0") _,
-        options(nostack, preserves_flags, readonly)
-    );
-    FromAsm::from_asm(r0)
-}