v2: SQLite state adapter, admin commands, compact feedback

- Replace in-memory Chat SDK state with SqliteStateAdapter — thread
  subscriptions now persist across restarts
- Add migration 002 for chat_sdk_kv, subscriptions, locks, lists tables
- Handle /clear in agent-runner (reset sessionId) — SDK has
  supportsNonInteractive:false for this command
- Pass /compact, /context, /cost, /files through to SDK as admin commands
- Skip admin commands in follow-up poll so they start fresh queries
- Emit compact_boundary events as user-visible feedback messages
- Pass NANOCLAW_ADMIN_USER_ID and NANOCLAW_ASSISTANT_NAME to containers

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

container/agent-runner/src/formatter.ts

@@ -9,7 +9,7 @@ import type { MessageInRow } from './db/messages-in.js';
  */
 export type CommandCategory = 'admin' | 'filtered' | 'passthrough' | 'none';
 
-const ADMIN_COMMANDS = new Set(['/remote-control', '/clear', '/compact']);
+const ADMIN_COMMANDS = new Set(['/remote-control', '/clear', '/compact', '/context', '/cost', '/files']);
 const FILTERED_COMMANDS = new Set(['/help', '/login', '/logout', '/doctor', '/config']);
 
 export interface CommandInfo {