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, 34 deletions

diff --git a/vendor/android-tzdata/Cargo.toml b/vendor/android-tzdata/Cargo.toml
deleted file mode 100644
index 805128a8..00000000
--- a/vendor/android-tzdata/Cargo.toml
+++ /dev/null
@@ -1,34 +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 = "2018"
-name = "android-tzdata"
-version = "0.1.1"
-authors = ["RumovZ"]
-include = [
-    "src/**/*",
-    "LICENSE-*",
-    "README.md",
-]
-description = "Parser for the Android-specific tzdata file"
-readme = "README.md"
-keywords = [
-    "parser",
-    "android",
-    "timezone",
-]
-categories = ["date-and-time"]
-license = "MIT OR Apache-2.0"
-repository = "https://github.com/RumovZ/android-tzdata"
-
-[dev-dependencies.zip]
-version = "0.6.4"