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, 48 deletions

diff --git a/vendor/hyper-timeout/examples/client.rs b/vendor/hyper-timeout/examples/client.rs
deleted file mode 100644
index 0e75c9c5..00000000
--- a/vendor/hyper-timeout/examples/client.rs
+++ /dev/null
@@ -1,48 +0,0 @@
-use std::env;
-use std::time::Duration;
-
-use http_body_util::{BodyExt, Empty};
-use hyper::body::Bytes;
-use hyper_util::{client::legacy::Client, rt::TokioExecutor};
-use tokio::io::{self, AsyncWriteExt};
-
-use hyper_tls::HttpsConnector;
-
-use hyper_timeout::TimeoutConnector;
-
-#[tokio::main(flavor = "current_thread")]
-async fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let url = match env::args().nth(1) {
-        Some(url) => url,
-        None => {
-            println!("Usage: client <url>");
-            println!("Example: client https://example.com");
-            return Ok(());
-        }
-    };
-
-    let url = url.parse::<hyper::Uri>().unwrap();
-
-    // This example uses `HttpsConnector`, but you can also use hyper `HttpConnector`
-    //let h = hyper_util::client::legacy::connect::HttpConnector::new();
-    let h = HttpsConnector::new();
-    let mut connector = TimeoutConnector::new(h);
-    connector.set_connect_timeout(Some(Duration::from_secs(5)));
-    connector.set_read_timeout(Some(Duration::from_secs(5)));
-    connector.set_write_timeout(Some(Duration::from_secs(5)));
-    let client = Client::builder(TokioExecutor::new()).build::<_, Empty<Bytes>>(connector);
-
-    let mut res = client.get(url).await?;
-
-    println!("Status: {}", res.status());
-    println!("Headers:\n{:#?}", res.headers());
-
-    while let Some(frame) = res.body_mut().frame().await {
-        let bytes = frame?
-            .into_data()
-            .map_err(|_| io::Error::new(io::ErrorKind::Other, "Error when consuming frame"))?;
-        io::stdout().write_all(&bytes).await?;
-    }
-
-    Ok(())
-}