feat: add standards wiki, MCP registry, and app template

templates/app/worker.py

@@ -0,0 +1,67 @@
+"""# Summary
+
+Background worker — polls for pending jobs and runs the item-sync pipeline.
+The poll loop is the pipeline axis of the blueprint: resources are created by
+the API axis, workers consume them on a fixed cadence.
+
+Notes:
+- This process is separate from the API process. Any in-memory event bus is per
+  process — if the pipeline must surface live progress to the API, swap the bus
+  adaptor for a broker-backed one (see standards 07_worker_and_progress).
+"""
+import asyncio
+import logging
+
+from config import settings
+from pipelines.item_sync import run_item_sync
+
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s [%(name)s] %(levelname)s: %(message)s",
+)
+
+logger = logging.getLogger(__name__)
+
+
+async def poll_jobs(resources: dict):
+    """Poll for pending jobs and run the item-sync pipeline on each.
+
+    Args:
+        resources (dict): Wired services from :func:`init.init`.
+    """
+    job_svc = resources["job_svc"]
+    logger.info("WORKER STARTED — poll=%ss max_retries=%d",
+                settings.worker_poll_seconds, settings.worker_max_retries)
+
+    while True:
+        pending = await job_svc.search(filter={"status": "pending"}, limit=10)
+        logger.info("Found %d pending job(s)", len(pending) if pending else 0)
+
+        for job in pending:
+            job_id = str(job.id)
+            if (job.retry_count or 0) >= settings.worker_max_retries:
+                logger.warning("SKIPPING job %s — retries exhausted", job_id)
+                continue
+
+            await job_svc.patch(job_id, {"status": "processing"})
+            try:
+                await run_item_sync(job, resources)
+                await job_svc.patch(job_id, {"status": "done", "error_message": ""})
+            except Exception as exc:  # noqa: BLE001
+                logger.exception("job %s FAILED: %s", job_id, exc)
+                await job_svc.patch(job_id, {"status": "failed", "error_message": str(exc)})
+
+        await asyncio.sleep(settings.worker_poll_seconds)
+
+
+if __name__ == "__main__":
+    from init import init, shutdown
+
+    async def _run():
+        resources = await init()
+        try:
+            await poll_jobs(resources)
+        finally:
+            await shutdown()
+
+    asyncio.run(_run())