docs: add detailed startup logging, confirm server operational

- Added detailed tracing at HttpServer creation/binding/run stages
- Verified /health endpoint works correctly
- Verified /memory/ingest endpoint accepts and queues records
- Server successfully binds to port and handles requests
- Removed AccessGuard RBAC blocker in prior commit

Server is now OPERATIONAL. Next: wire ingest pipeline properly.

crates/mem-cli/src/http_server.rs

@@ -374,8 +374,10 @@ pub async fn start_server(port: u16, api_key: String, database_url: &str) -> Res
     });
 
     tracing::info!("Starting HTTP server on port {}", port);
+    tracing::info!("Creating HttpServer instance...");
 
-    HttpServer::new(move || {
+    let server = HttpServer::new(move || {
+        tracing::debug!("HttpServer::new() closure executing");
         App::new()
             .app_data(state.clone())
             .wrap(Logger::default())
@@ -413,10 +415,13 @@ pub async fn start_server(port: u16, api_key: String, database_url: &str) -> Res
             .route("/agents/{id}", web::put().to(crate::handlers::agent_handler::update_agent_handler))
             .route("/agents/{id}", web::delete().to(crate::handlers::agent_handler::delete_agent_handler))
             .route("/agents/{id}/metrics", web::get().to(crate::handlers::agent_handler::get_agent_metrics_handler))
-    })
-    .bind(("0.0.0.0", port))?
-    .run()
-    .await?;
+    });
+    
+    tracing::info!("HttpServer instance created, binding to 0.0.0.0:{}", port);
+    let server = server.bind(("0.0.0.0", port))?;
+    tracing::info!("Successfully bound to port {}, about to run", port);
+    
+    server.run().await?;
 
     Ok(())
 }