fix: check Gitea API response status and fallback for PR reviews (#47)

## Summary
- Add HTTP response status checking to all Gitea tracker methods that were silently swallowing errors
- Add fallback in create_pr_review: if inline comments fail, retry as plain PR comment

## Test plan
- [ ] Deploy and trigger a PR review, check logs for actual error details
- [ ] Verify fallback posts summary comment when inline comments fail

Co-authored-by: Sharang Parnerkar <parnerkarsharang@gmail.com>
Co-authored-by: Sharang Parnerkar <30073382+mighty840@users.noreply.github.com>
Reviewed-on: #47

compliance-mcp/src/main.rs

@@ -41,7 +41,9 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             StreamableHttpServerConfig::default(),
         );
 
-        let router = axum::Router::new().nest_service("/mcp", service);
+        let router = axum::Router::new()
+            .route("/health", axum::routing::get(|| async { "ok" }))
+            .nest_service("/mcp", service);
         let listener = tokio::net::TcpListener::bind(("0.0.0.0", port)).await?;
         tracing::info!("MCP HTTP server listening on 0.0.0.0:{port}");
         axum::serve(listener, router).await?;