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, 45 deletions

diff --git a/vendor/fixedbitset/Cargo.toml b/vendor/fixedbitset/Cargo.toml
deleted file mode 100644
index e5268803..00000000
--- a/vendor/fixedbitset/Cargo.toml
+++ /dev/null
@@ -1,45 +0,0 @@
-# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
-#
-# When uploading crates to the registry Cargo will automatically
-# "normalize" Cargo.toml files for maximal compatibility
-# with all versions of Cargo and also rewrite `path` dependencies
-# to registry (e.g., crates.io) dependencies.
-#
-# If you are reading this file be aware that the original Cargo.toml
-# will likely look very different (and much more reasonable).
-# See Cargo.toml.orig for the original contents.
-
-[package]
-edition = "2021"
-rust-version = "1.56"
-name = "fixedbitset"
-version = "0.5.7"
-authors = ["bluss"]
-description = "FixedBitSet is a simple bitset collection"
-documentation = "https://docs.rs/fixedbitset/"
-readme = "README.md"
-keywords = [
-    "container",
-    "data-structure",
-    "bitvec",
-    "bitset",
-    "no_std",
-]
-categories = ["data-structures"]
-license = "MIT OR Apache-2.0"
-repository = "https://github.com/petgraph/fixedbitset"
-
-[package.metadata.release]
-no-dev-version = true
-tag-name = "{{version}}"
-
-[dependencies.serde]
-version = "1.0"
-optional = true
-
-[dev-dependencies.serde_json]
-version = "1.0"
-
-[features]
-default = ["std"]
-std = []