fix: Add missing create_batch_reasoning_regular_schedule helper function

Demo seed script was failing with ImportError because the
create_batch_reasoning_regular_schedule function was referenced
but not implemented in reasoning_types.py.

Added the missing helper function to support REGULAR_SCHEDULE
batch reasoning type for regular scheduled production batches.

Fixes container restart loop in demo-seed-production-batches pod.

shared/schemas/reasoning_types.py

@@ -265,3 +265,29 @@ def create_batch_reasoning_customer_order(
             "ai_assisted": False
         }
     }
+
+
+def create_batch_reasoning_regular_schedule(
+    product_name: str,
+    scheduled_quantity: float,
+    production_schedule: str = "daily"
+) -> Dict[str, Any]:
+    """Create reasoning data for regular scheduled production"""
+    return {
+        "type": ProductionBatchReasoningType.REGULAR_SCHEDULE.value,
+        "parameters": {
+            "product_name": product_name,
+            "scheduled_quantity": round(scheduled_quantity, 1),
+            "production_schedule": production_schedule
+        },
+        "urgency": {
+            "level": "normal",
+            "ready_by_time": "08:00",
+            "customer_commitment": False
+        },
+        "metadata": {
+            "trigger_source": "orchestrator_auto",
+            "ai_assisted": False
+        }
+    }
+