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>

src/host-sweep.ts

@@ -142,7 +142,17 @@ async function sweepSession(session: Session): Promise<void> {
         db.prepare(
           `INSERT INTO messages_in (id, seq, kind, timestamp, status, process_after, recurrence, platform_id, channel_type, thread_id, content)
            VALUES (?, ?, ?, datetime('now'), 'pending', ?, ?, ?, ?, ?, ?)`,
-        ).run(newId, nextSeq, msg.kind, nextRun, msg.recurrence, msg.platform_id, msg.channel_type, msg.thread_id, msg.content);
+        ).run(
+          newId,
+          nextSeq,
+          msg.kind,
+          nextRun,
+          msg.recurrence,
+          msg.platform_id,
+          msg.channel_type,
+          msg.thread_id,
+          msg.content,
+        );
 
         // Remove recurrence from the completed message so it doesn't spawn again
         db.prepare('UPDATE messages_in SET recurrence = NULL WHERE id = ?').run(msg.id);