phase 17: fix scheduler config parsing, worker entry points, and seed data for Polygon sources

services/scheduler/app.py

@@ -12,6 +12,21 @@ import logging
 from datetime import datetime
 from typing import Any, Optional
 
+
+def _ensure_dict(val: Any) -> Optional[dict]:
+    """Coerce a JSONB value (dict or JSON string) to a Python dict."""
+    if val is None:
+        return None
+    if isinstance(val, dict):
+        return val
+    if isinstance(val, str):
+        try:
+            parsed = json.loads(val)
+            return parsed if isinstance(parsed, dict) else None
+        except (json.JSONDecodeError, TypeError):
+            return None
+    return None
+
 import asyncpg
 import redis.asyncio as aioredis
 
@@ -132,7 +147,7 @@ def build_job_payload(
         "aliases": aliases,
         "source_type": source["source_type"],
         "source_name": source["source_name"],
-        "config": dict(source["config"]) if source["config"] else {},
+        "config": _ensure_dict(source["config"]) or {},
         "credibility_score": float(source["credibility_score"]) if source["credibility_score"] else 0.5,
         "scheduled_at": now.isoformat(),
     }
@@ -223,7 +238,7 @@ async def schedule_cycle(pool: asyncpg.Pool, rds: aioredis.Redis) -> int:
     for src in sources:
         source_id = src["source_id"]
         source_type = src["source_type"]
-        source_config = dict(src["config"]) if src["config"] else None
+        source_config = _ensure_dict(src["config"])
 
         # Check last run status and timing
         last_run = await fetch_last_run(pool, source_id)