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, 50 deletions

diff --git a/vendor/futures-task/src/lib.rs b/vendor/futures-task/src/lib.rs
deleted file mode 100644
index c119b6b1..00000000
--- a/vendor/futures-task/src/lib.rs
+++ /dev/null
@@ -1,50 +0,0 @@
-//! Tools for working with tasks.
-
-#![no_std]
-#![doc(test(
-    no_crate_inject,
-    attr(
-        deny(warnings, rust_2018_idioms, single_use_lifetimes),
-        allow(dead_code, unused_assignments, unused_variables)
-    )
-))]
-#![warn(missing_docs, unsafe_op_in_unsafe_fn)]
-
-#[cfg(feature = "alloc")]
-extern crate alloc;
-#[cfg(feature = "std")]
-extern crate std;
-
-mod spawn;
-pub use crate::spawn::{LocalSpawn, Spawn, SpawnError};
-
-#[cfg_attr(target_os = "none", cfg(target_has_atomic = "ptr"))]
-#[cfg(feature = "alloc")]
-mod arc_wake;
-#[cfg_attr(target_os = "none", cfg(target_has_atomic = "ptr"))]
-#[cfg(feature = "alloc")]
-pub use crate::arc_wake::ArcWake;
-
-#[cfg_attr(target_os = "none", cfg(target_has_atomic = "ptr"))]
-#[cfg(feature = "alloc")]
-mod waker;
-#[cfg_attr(target_os = "none", cfg(target_has_atomic = "ptr"))]
-#[cfg(feature = "alloc")]
-pub use crate::waker::waker;
-
-#[cfg_attr(target_os = "none", cfg(target_has_atomic = "ptr"))]
-#[cfg(feature = "alloc")]
-mod waker_ref;
-#[cfg_attr(target_os = "none", cfg(target_has_atomic = "ptr"))]
-#[cfg(feature = "alloc")]
-pub use crate::waker_ref::{waker_ref, WakerRef};
-
-mod future_obj;
-pub use crate::future_obj::{FutureObj, LocalFutureObj, UnsafeFutureObj};
-
-mod noop_waker;
-pub use crate::noop_waker::noop_waker;
-pub use crate::noop_waker::noop_waker_ref;
-
-#[doc(no_inline)]
-pub use core::task::{Context, Poll, RawWaker, RawWakerVTable, Waker};