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, 19 deletions

diff --git a/vendor/windows-strings/src/bindings.rs b/vendor/windows-strings/src/bindings.rs
deleted file mode 100644
index 2e0ad17d..00000000
--- a/vendor/windows-strings/src/bindings.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-#![allow(
-    non_snake_case,
-    non_upper_case_globals,
-    non_camel_case_types,
-    dead_code,
-    clippy::all
-)]
-
-windows_link::link!("kernel32.dll" "system" fn GetProcessHeap() -> HANDLE);
-windows_link::link!("kernel32.dll" "system" fn HeapAlloc(hheap : HANDLE, dwflags : HEAP_FLAGS, dwbytes : usize) -> *mut core::ffi::c_void);
-windows_link::link!("kernel32.dll" "system" fn HeapFree(hheap : HANDLE, dwflags : HEAP_FLAGS, lpmem : *const core::ffi::c_void) -> BOOL);
-windows_link::link!("oleaut32.dll" "system" fn SysAllocStringLen(strin : PCWSTR, ui : u32) -> BSTR);
-windows_link::link!("oleaut32.dll" "system" fn SysFreeString(bstrstring : BSTR));
-windows_link::link!("oleaut32.dll" "system" fn SysStringLen(pbstr : BSTR) -> u32);
-pub type BOOL = i32;
-pub type BSTR = *const u16;
-pub type HANDLE = *mut core::ffi::c_void;
-pub type HEAP_FLAGS = u32;
-pub type PCWSTR = *const u16;