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, 110 deletions

diff --git a/vendor/smallvec/Cargo.toml b/vendor/smallvec/Cargo.toml
deleted file mode 100644
index d9a4f3b2..00000000
--- a/vendor/smallvec/Cargo.toml
+++ /dev/null
@@ -1,110 +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 = "smallvec"
-version = "1.15.1"
-authors = ["The Servo Project Developers"]
-build = false
-autolib = false
-autobins = false
-autoexamples = false
-autotests = false
-autobenches = false
-description = "'Small vector' optimization: store up to a small number of items on the stack"
-documentation = "https://docs.rs/smallvec/"
-readme = "README.md"
-keywords = [
-    "small",
-    "vec",
-    "vector",
-    "stack",
-    "no_std",
-]
-categories = ["data-structures"]
-license = "MIT OR Apache-2.0"
-repository = "https://github.com/servo/rust-smallvec"
-
-[package.metadata.docs.rs]
-all-features = true
-rustdoc-args = [
-    "--cfg",
-    "docsrs",
-    "--generate-link-to-definition",
-]
-
-[features]
-const_generics = []
-const_new = ["const_generics"]
-debugger_visualizer = []
-drain_filter = []
-drain_keep_rest = ["drain_filter"]
-impl_bincode = [
-    "bincode",
-    "unty",
-]
-may_dangle = []
-specialization = []
-union = []
-write = []
-
-[lib]
-name = "smallvec"
-path = "src/lib.rs"
-
-[[test]]
-name = "debugger_visualizer"
-path = "tests/debugger_visualizer.rs"
-test = false
-required-features = ["debugger_visualizer"]
-
-[[test]]
-name = "macro"
-path = "tests/macro.rs"
-
-[[bench]]
-name = "bench"
-path = "benches/bench.rs"
-
-[dependencies.arbitrary]
-version = "1"
-optional = true
-
-[dependencies.bincode]
-version = "2"
-optional = true
-default-features = false
-
-[dependencies.malloc_size_of]
-version = "0.1"
-optional = true
-default-features = false
-
-[dependencies.serde]
-version = "1"
-optional = true
-default-features = false
-
-[dependencies.unty]
-version = "0.0.4"
-optional = true
-default-features = false
-
-[dev-dependencies.bincode1]
-version = "1.0.1"
-package = "bincode"
-
-[dev-dependencies.debugger_test]
-version = "0.1.0"
-
-[dev-dependencies.debugger_test_parser]
-version = "0.1.0"