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, 31 deletions

diff --git a/vendor/logos-codegen/tests/codegen.rs b/vendor/logos-codegen/tests/codegen.rs
deleted file mode 100644
index 5f53c0db..00000000
--- a/vendor/logos-codegen/tests/codegen.rs
+++ /dev/null
@@ -1,31 +0,0 @@
-use std::{error::Error, io, path::PathBuf};
-
-#[rstest::rstest]
-#[case("simple")]
-#[case("no_error_lut")]
-pub fn test_codegen(#[case] fixture: &str) -> Result<(), Box<dyn Error>> {
-    let mut fixture_dir = PathBuf::new();
-    fixture_dir.push(env!("CARGO_MANIFEST_DIR"));
-    fixture_dir.push("tests");
-    fixture_dir.push("data");
-    fixture_dir.push(fixture);
-
-    let input = fixture_dir.join("input.rs");
-    fixture_dir.push("output.rs");
-    let output_file = fixture_dir;
-
-    let input = std::fs::read_to_string(input)?;
-    let output = std::fs::read_to_string(&output_file)?;
-
-    let generated = logos_codegen::generate(input.parse()?);
-    let generated = generated.to_string();
-
-    if std::env::var("BLESS_CODEGEN").is_ok_and(|value| value == "1") {
-        std::fs::write(&output_file, &generated)?;
-        return Ok(());
-    }
-
-    assert_eq!(generated, output, "Codegen test failed: `{fixture}`, run tests again with env var `BLESS_CODEGEN=1` to bless these changes");
-
-    Ok(())
-}