feat(queue): add registerQueueCommand for mosaic queue CLI surface

Implements CU-05-03: adds queue list, stats, pause, resume, jobs tail,
and drain subcommands. Local adapter stubs unsupported ops with a clear
message. Wires into @mosaicstack/mosaic CLI via registerQueueCommand(program).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/mosaic/src/cli.ts

@@ -3,6 +3,7 @@
 import { createRequire } from 'module';
 import { Command } from 'commander';
 import { registerQualityRails } from '@mosaicstack/quality-rails';
+import { registerQueueCommand } from '@mosaicstack/queue';
 import { registerAgentCommand } from './commands/agent.js';
 import { registerMissionCommand } from './commands/mission.js';
 // prdy is registered via launch.ts
@@ -318,6 +319,10 @@ registerMissionCommand(program);
 
 registerQualityRails(program);
 
+// ─── queue ───────────────────────────────────────────────────────────────
+
+registerQueueCommand(program);
+
 // ─── update ─────────────────────────────────────────────────────────────
 
 program