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/thiserror/src/aserror.rs b/vendor/thiserror/src/aserror.rs
deleted file mode 100644
index ac91cc86..00000000
--- a/vendor/thiserror/src/aserror.rs
+++ /dev/null
@@ -1,50 +0,0 @@
-use core::error::Error;
-use core::panic::UnwindSafe;
-
-#[doc(hidden)]
-pub trait AsDynError<'a>: Sealed {
-    fn as_dyn_error(&self) -> &(dyn Error + 'a);
-}
-
-impl<'a, T: Error + 'a> AsDynError<'a> for T {
-    #[inline]
-    fn as_dyn_error(&self) -> &(dyn Error + 'a) {
-        self
-    }
-}
-
-impl<'a> AsDynError<'a> for dyn Error + 'a {
-    #[inline]
-    fn as_dyn_error(&self) -> &(dyn Error + 'a) {
-        self
-    }
-}
-
-impl<'a> AsDynError<'a> for dyn Error + Send + 'a {
-    #[inline]
-    fn as_dyn_error(&self) -> &(dyn Error + 'a) {
-        self
-    }
-}
-
-impl<'a> AsDynError<'a> for dyn Error + Send + Sync + 'a {
-    #[inline]
-    fn as_dyn_error(&self) -> &(dyn Error + 'a) {
-        self
-    }
-}
-
-impl<'a> AsDynError<'a> for dyn Error + Send + Sync + UnwindSafe + 'a {
-    #[inline]
-    fn as_dyn_error(&self) -> &(dyn Error + 'a) {
-        self
-    }
-}
-
-#[doc(hidden)]
-pub trait Sealed {}
-impl<T: Error> Sealed for T {}
-impl Sealed for dyn Error + '_ {}
-impl Sealed for dyn Error + Send + '_ {}
-impl Sealed for dyn Error + Send + Sync + '_ {}
-impl Sealed for dyn Error + Send + Sync + UnwindSafe + '_ {}