fix: reduce docker stop timeout for faster restarts

Pass -t 1 to docker stop, reducing SIGTERM-to-SIGKILL grace period from
10s to 1s. NanoClaw containers are stateless (--rm, mounted filesystems)
so they don't need a long grace period. Makes restarts ~10x faster.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/container-runtime.ts

@@ -59,7 +59,7 @@ export function readonlyMountArgs(
 
 /** Returns the shell command to stop a container by name. */
 export function stopContainer(name: string): string {
-  return `${CONTAINER_RUNTIME_BIN} stop ${name}`;
+  return `${CONTAINER_RUNTIME_BIN} stop -t 1 ${name}`;
 }
 
 /** Ensure the container runtime is running, starting it if needed. */