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, 66 deletions

diff --git a/vendor/rustix/src/termios/ioctl.rs b/vendor/rustix/src/termios/ioctl.rs
deleted file mode 100644
index 22945566..00000000
--- a/vendor/rustix/src/termios/ioctl.rs
+++ /dev/null
@@ -1,66 +0,0 @@
-//! Terminal-related `ioctl` functions.
-
-#![allow(unsafe_code)]
-
-use crate::fd::AsFd;
-use crate::{backend, io, ioctl};
-use backend::c;
-
-/// `ioctl(fd, TIOCEXCL)`—Enables exclusive mode on a terminal.
-///
-/// In exclusive mode, subsequent unprivileged `open` calls on the terminal
-/// device fail with [`io::Errno::BUSY`].
-///
-/// # References
-///  - [Linux]
-///  - [FreeBSD]
-///  - [NetBSD]
-///  - [OpenBSD]
-///
-/// [Linux]: https://man7.org/linux/man-pages/man4/tty_ioctl.4.html
-/// [FreeBSD]: https://man.freebsd.org/cgi/man.cgi?query=tty&sektion=4
-/// [NetBSD]: https://man.netbsd.org/tty.4
-/// [OpenBSD]: https://man.openbsd.org/tty.4
-#[cfg(not(any(
-    windows,
-    target_os = "horizon",
-    target_os = "redox",
-    target_os = "wasi"
-)))]
-#[inline]
-#[doc(alias = "TIOCEXCL")]
-pub fn ioctl_tiocexcl<Fd: AsFd>(fd: Fd) -> io::Result<()> {
-    // SAFETY: `TIOCEXCL` is a no-argument setter opcode.
-    unsafe {
-        let ctl = ioctl::NoArg::<{ c::TIOCEXCL as _ }>::new();
-        ioctl::ioctl(fd, ctl)
-    }
-}
-
-/// `ioctl(fd, TIOCNXCL)`—Disables exclusive mode on a terminal.
-///
-/// # References
-///  - [Linux]
-///  - [FreeBSD]
-///  - [NetBSD]
-///  - [OpenBSD]
-///
-/// [Linux]: https://man7.org/linux/man-pages/man4/tty_ioctl.4.html
-/// [FreeBSD]: https://man.freebsd.org/cgi/man.cgi?query=tty&sektion=4
-/// [NetBSD]: https://man.netbsd.org/tty.4
-/// [OpenBSD]: https://man.openbsd.org/tty.4
-#[cfg(not(any(
-    windows,
-    target_os = "horizon",
-    target_os = "redox",
-    target_os = "wasi"
-)))]
-#[inline]
-#[doc(alias = "TIOCNXCL")]
-pub fn ioctl_tiocnxcl<Fd: AsFd>(fd: Fd) -> io::Result<()> {
-    // SAFETY: `TIOCNXCL` is a no-argument setter opcode.
-    unsafe {
-        let ctl = ioctl::NoArg::<{ c::TIOCNXCL as _ }>::new();
-        ioctl::ioctl(fd, ctl)
-    }
-}