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, 54 deletions

diff --git a/vendor/security-framework/src/os/macos/transform.rs b/vendor/security-framework/src/os/macos/transform.rs
deleted file mode 100644
index d03bc1f7..00000000
--- a/vendor/security-framework/src/os/macos/transform.rs
+++ /dev/null
@@ -1,54 +0,0 @@
-//! Transform support
-
-use core_foundation::base::{CFType, TCFType};
-use core_foundation::error::CFError;
-use core_foundation::string::CFString;
-use security_framework_sys::transform::*;
-use std::ptr;
-
-declare_TCFType! {
-    /// A type representing a transform.
-    SecTransform, SecTransformRef
-}
-impl_TCFType!(SecTransform, SecTransformRef, SecTransformGetTypeID);
-
-unsafe impl Sync for SecTransform {}
-unsafe impl Send for SecTransform {}
-
-impl SecTransform {
-    /// Sets an attribute of the transform.
-    pub fn set_attribute<T>(&mut self, key: &CFString, value: &T) -> Result<(), CFError>
-    where
-        T: TCFType,
-    {
-        unsafe {
-            let mut error = ptr::null_mut();
-            SecTransformSetAttribute(
-                self.0,
-                key.as_concrete_TypeRef(),
-                value.as_CFTypeRef(),
-                &mut error,
-            );
-            if !error.is_null() {
-                return Err(CFError::wrap_under_create_rule(error));
-            }
-
-            Ok(())
-        }
-    }
-
-    /// Executes the transform.
-    ///
-    /// The return type depends on the type of transform.
-    pub fn execute(&mut self) -> Result<CFType, CFError> {
-        unsafe {
-            let mut error = ptr::null_mut();
-            let result = SecTransformExecute(self.0, &mut error);
-            if result.is_null() {
-                return Err(CFError::wrap_under_create_rule(error));
-            }
-
-            Ok(CFType::wrap_under_create_rule(result))
-        }
-    }
-}