fix: lint errors (import sorting, unused vars)

services/recommendation/worker.py

@@ -15,6 +15,7 @@ from datetime import datetime, timezone
 import asyncpg
 from minio import Minio
 
+from services.aggregation.projection import TrendProjection
 from services.lake_publisher.worker import publish_recommendation_facts
 from services.recommendation.eligibility import (
     EligibilityConfig,
@@ -31,7 +32,6 @@ from services.recommendation.thesis_llm import (
     THESIS_PROMPT_VERSION,
     rewrite_thesis_with_llm,
 )
-from services.aggregation.projection import TrendProjection
 from services.shared.config import OllamaConfig
 from services.shared.metrics import (
     RECOMMENDATION_CONFIDENCE,