fix: ops pipeline — rate limit, validation cycle, snapshots, config query, rejection reason

- Polygon rate limit env-configurable, default 5 (free tier)
- v3_engine_enabled reads from JSONB config column correctly
- Validation cycle (outcome eval + metrics) wired into scheduler hourly
- Daily portfolio/risk snapshots after 16:30 ET with idempotency
- Prediction snapshot price fallback from positions table
- Order rejection_reason + rejected_at persisted on insert
- Lake-publisher scaled to 0 replicas (redundant)
- Test fix: isolate per-type rate limit tests from Polygon global

services/adapters/broker_service.py

@@ -105,12 +105,12 @@ INSERT INTO orders (
     id, recommendation_id, broker_account_id, ticker, side, order_type,
     quantity, limit_price, stop_price, status, idempotency_key,
     broker_order_id, decision_trace, submitted_at, filled_at,
-    fill_price, fill_quantity
+    fill_price, fill_quantity, rejection_reason, rejected_at
 ) VALUES (
     $1::uuid, $2, $3::uuid, $4, $5, $6,
     $7, $8, $9, $10, $11,
     $12, $13::jsonb, $14, $15,
-    $16, $17
+    $16, $17, $18, $19
 )
 ON CONFLICT (idempotency_key) DO UPDATE SET
     status = EXCLUDED.status,
@@ -118,6 +118,8 @@ ON CONFLICT (idempotency_key) DO UPDATE SET
     filled_at = EXCLUDED.filled_at,
     fill_price = EXCLUDED.fill_price,
     fill_quantity = EXCLUDED.fill_quantity,
+    rejection_reason = COALESCE(EXCLUDED.rejection_reason, orders.rejection_reason),
+    rejected_at = COALESCE(EXCLUDED.rejected_at, orders.rejected_at),
     updated_at = NOW()
 """
 
@@ -361,6 +363,8 @@ async def persist_order(
     """Persist order, events, and risk evaluation to PostgreSQL."""
     now = datetime.now(timezone.utc)
     filled_at = now if resp.status == OrderStatus.FILLED else None
+    rejection_reason = resp.error if resp.status == OrderStatus.REJECTED else None
+    rejected_at = now if resp.status == OrderStatus.REJECTED else None
 
     decision_trace = {
         "risk_evaluation": risk_eval,
@@ -389,6 +393,8 @@ async def persist_order(
                 filled_at,
                 resp.filled_avg_price,
                 resp.filled_quantity,
+                rejection_reason,
+                rejected_at,
             )
 
             # Record order events