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, 21 deletions

diff --git a/vendor/logos-codegen/build.rs b/vendor/logos-codegen/build.rs
deleted file mode 100644
index f11a575f..00000000
--- a/vendor/logos-codegen/build.rs
+++ /dev/null
@@ -1,21 +0,0 @@
-use rustc_version::{version_meta, Version};
-
-fn main() {
-    let version_meta = version_meta().expect("Could not get Rust version");
-
-    let rustc_version = version_meta.semver;
-    let trimmed_rustc_version = Version::new(
-        rustc_version.major,
-        rustc_version.minor,
-        rustc_version.patch,
-    );
-
-    // Add cfg flag for Rust >= 1.82
-    // Required for precise capturing in edition 2024
-    // Due to changes in lifetime and type capture behavior for impl trait
-    // see: https://github.com/maciejhirsz/logos/issues/434, https://github.com/rust-lang/rfcs/pull/3498
-    println!("cargo:rustc-check-cfg=cfg(rust_1_82)");
-    if trimmed_rustc_version >= Version::new(1, 82, 0) {
-        println!("cargo:rustc-cfg=rust_1_82");
-    }
-}