feat(pipeline): add submit-pass0b endpoint for batch submission

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

control-pipeline/api/control_generator_routes.py

@@ -2291,3 +2291,31 @@ async def get_batch_process_status(job_id: str):
     if not status:
         raise HTTPException(status_code=404, detail="Batch processing job not found")
     return status
+
+
+class SubmitPass0bRequest(BaseModel):
+    limit: int = 10
+    batch_size: int = 5
+
+
+@router.post("/generate/submit-pass0b")
+async def submit_pass0b(req: SubmitPass0bRequest):
+    """Submit Pass 0b batch to Anthropic Batch API.
+
+    Loads unprocessed obligations, applies pre-LLM filter, submits batch.
+    Returns batch_id for status polling and later result processing.
+    """
+    from services.decomposition_pass import DecompositionPass
+    db = SessionLocal()
+    try:
+        dp = DecompositionPass(db)
+        result = await dp.submit_batch_pass0b(
+            limit=req.limit,
+            batch_size=req.batch_size,
+        )
+        return result
+    except Exception as e:
+        logger.error("Submit Pass 0b failed: %s", e)
+        raise HTTPException(status_code=500, detail=str(e))
+    finally:
+        db.close()