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, 29 deletions

diff --git a/vendor/security-framework-sys/src/encrypt_transform.rs b/vendor/security-framework-sys/src/encrypt_transform.rs
deleted file mode 100644
index 85330527..00000000
--- a/vendor/security-framework-sys/src/encrypt_transform.rs
+++ /dev/null
@@ -1,29 +0,0 @@
-use core_foundation_sys::error::CFErrorRef;
-use core_foundation_sys::string::CFStringRef;
-
-use crate::base::SecKeyRef;
-use crate::transform::SecTransformRef;
-
-extern "C" {
-    pub static kSecEncryptionMode: CFStringRef;
-    pub static kSecEncryptKey: CFStringRef;
-    pub static kSecIVKey: CFStringRef;
-    pub static kSecModeCBCKey: CFStringRef;
-    pub static kSecModeCFBKey: CFStringRef;
-    pub static kSecModeECBKey: CFStringRef;
-    pub static kSecModeNoneKey: CFStringRef;
-    pub static kSecModeOFBKey: CFStringRef;
-    pub static kSecPaddingKey: CFStringRef;
-    pub static kSecPaddingNoneKey: CFStringRef;
-    pub static kSecPaddingOAEPKey: CFStringRef;
-    pub static kSecPaddingPKCS1Key: CFStringRef;
-    pub static kSecPaddingPKCS5Key: CFStringRef;
-    pub static kSecPaddingPKCS7Key: CFStringRef;
-
-    pub fn SecDecryptTransformCreate(keyRef: SecKeyRef, error: *mut CFErrorRef) -> SecTransformRef;
-    // this symbol is apparently missing in 10.13.3?
-    // pub fn SecDecryptTransformGetTypeID() -> CFTypeID;
-    pub fn SecEncryptTransformCreate(keyRef: SecKeyRef, error: *mut CFErrorRef) -> SecTransformRef;
-// this symbol is apparently missing in 10.13.3?
-// pub fn SecEncryptTransformGetTypeID() -> CFTypeID;
-}