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, 44 deletions

diff --git a/vendor/hyper/src/cfg.rs b/vendor/hyper/src/cfg.rs
deleted file mode 100644
index 71a5351d..00000000
--- a/vendor/hyper/src/cfg.rs
+++ /dev/null
@@ -1,44 +0,0 @@
-macro_rules! cfg_feature {
-    (
-        #![$meta:meta]
-        $($item:item)*
-    ) => {
-        $(
-            #[cfg($meta)]
-            #[cfg_attr(docsrs, doc(cfg($meta)))]
-            $item
-        )*
-    }
-}
-
-macro_rules! cfg_proto {
-    ($($item:item)*) => {
-        cfg_feature! {
-            #![all(
-                any(feature = "http1", feature = "http2"),
-                any(feature = "client", feature = "server"),
-            )]
-            $($item)*
-        }
-    }
-}
-
-cfg_proto! {
-    macro_rules! cfg_client {
-        ($($item:item)*) => {
-            cfg_feature! {
-                #![feature = "client"]
-                $($item)*
-            }
-        }
-    }
-
-    macro_rules! cfg_server {
-        ($($item:item)*) => {
-            cfg_feature! {
-                #![feature = "server"]
-                $($item)*
-            }
-        }
-    }
-}