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, 53 deletions

diff --git a/vendor/winapi-util/Cargo.toml b/vendor/winapi-util/Cargo.toml
deleted file mode 100644
index 5e7f917f..00000000
--- a/vendor/winapi-util/Cargo.toml
+++ /dev/null
@@ -1,53 +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"
-name = "winapi-util"
-version = "0.1.9"
-authors = ["Andrew Gallant <jamslam@gmail.com>"]
-build = false
-autobins = false
-autoexamples = false
-autotests = false
-autobenches = false
-description = "A dumping ground for high level safe wrappers over windows-sys."
-homepage = "https://github.com/BurntSushi/winapi-util"
-documentation = "https://docs.rs/winapi-util"
-readme = "README.md"
-keywords = [
-    "windows",
-    "windows-sys",
-    "util",
-    "win",
-]
-categories = [
-    "os::windows-apis",
-    "external-ffi-bindings",
-]
-license = "Unlicense OR MIT"
-repository = "https://github.com/BurntSushi/winapi-util"
-
-[package.metadata.docs.rs]
-targets = ["x86_64-pc-windows-msvc"]
-
-[lib]
-name = "winapi_util"
-path = "src/lib.rs"
-
-[target."cfg(windows)".dependencies.windows-sys]
-version = ">=0.48.0, <=0.59.*"
-features = [
-    "Win32_Foundation",
-    "Win32_Storage_FileSystem",
-    "Win32_System_Console",
-    "Win32_System_SystemInformation",
-]