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, 24 deletions

diff --git a/vendor/smallvec/scripts/run_miri.sh b/vendor/smallvec/scripts/run_miri.sh
deleted file mode 100644
index 010ceb06..00000000
--- a/vendor/smallvec/scripts/run_miri.sh
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/usr/bin/bash
-
-set -ex
-
-# Clean out our target dir, which may have artifacts compiled by a version of
-# rust different from the one we're about to download.
-cargo clean
-
-# Install and run the latest version of nightly where miri built successfully.
-# Taken from: https://github.com/rust-lang/miri#running-miri-on-ci
-
-MIRI_NIGHTLY=nightly-$(curl -s https://rust-lang.github.io/rustup-components-history/x86_64-unknown-linux-gnu/miri)
-echo "Installing latest nightly with Miri: $MIRI_NIGHTLY"
-rustup override unset
-rustup default "$MIRI_NIGHTLY"
-
-rustup component add miri
-cargo miri setup
-
-cargo miri test --verbose
-cargo miri test --verbose --features union
-cargo miri test --verbose --all-features
-
-rustup override set nightly