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, 37 deletions

diff --git a/vendor/security-framework-sys/src/keychain_item.rs b/vendor/security-framework-sys/src/keychain_item.rs
deleted file mode 100644
index 9b41f100..00000000
--- a/vendor/security-framework-sys/src/keychain_item.rs
+++ /dev/null
@@ -1,37 +0,0 @@
-use crate::base::{SecKeychainAttributeList, SecKeychainItemRef};
-use core_foundation_sys::base::{CFTypeID, CFTypeRef, OSStatus};
-use core_foundation_sys::dictionary::CFDictionaryRef;
-use std::os::raw::c_void;
-
-extern "C" {
-
-    /// Returns the unique identifier of the opaque type to which a keychain item object belongs.
-    pub fn SecKeychainItemGetTypeID() -> CFTypeID;
-
-    /// Adds one or more items to a keychain.
-    pub fn SecItemAdd(attributes: CFDictionaryRef, result: *mut CFTypeRef) -> OSStatus;
-
-    /// Returns one or more keychain items that match a search query, or copies attributes of specific keychain items.
-    pub fn SecItemCopyMatching(query: CFDictionaryRef, result: *mut CFTypeRef) -> OSStatus;
-
-    /// Modifies items that match a search query.
-    pub fn SecItemUpdate(query: CFDictionaryRef, attributesToUpdate: CFDictionaryRef) -> OSStatus;
-
-    /// Deletes items that match a search query.
-    pub fn SecItemDelete(query: CFDictionaryRef) -> OSStatus;
-
-    /// # Legacy API
-    pub fn SecKeychainItemModifyAttributesAndData(
-        itemRef: SecKeychainItemRef,
-        attrList: *const SecKeychainAttributeList,
-        length: u32,
-        data: *const c_void,
-    ) -> OSStatus;
-
-    pub fn SecKeychainItemFreeContent(
-        attrList: *mut SecKeychainAttributeList,
-        data: *mut c_void,
-    ) -> OSStatus;
-
-    pub fn SecKeychainItemDelete(itemRef: SecKeychainItemRef) -> OSStatus;
-}