feat(runner): queue workflow runs with BullMQ (phase A)

Enqueue HTTP, cron, and manual runs via Redis/BullMQ; workers execute
asynchronously with configurable concurrency. Triggers return 202 and
clients poll GET /api/runs/:id for progress (queued → running → done).

Co-authored-by: Nasyarobby Putra <nasyarobby@gmail.com>

packages/server/package.json

@@ -17,7 +17,9 @@
     "axios": "^1.19.0",
     "bcryptjs": "^3.0.2",
     "better-sqlite3": "^13.0.3",
+    "bullmq": "^6.1.2",
     "fastify": "^5.12.0",
+    "ioredis": "^6.0.0",
     "jsonata": "^2.2.2",
     "knex": "^3.3.0",
     "mustache": "^4.2.0",