feat: wire remaining handlers — tag, quota, register asset, sidecar, processing

14 new endpoints: POST tags, GET quota, POST register, 6 sidecar, 7 processing.
DTOs, AppState groups, LogSidecarWriter, full bootstrap wiring.

crates/bootstrap/src/main.rs

@@ -4,6 +4,7 @@ use tracing::info;
 mod config;
 mod factory;
 mod log_event_publisher;
+mod log_sidecar_writer;
 
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {