Initial commit: import from sinmb79/Gov-chat-bot

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/services/complaint_logger.py

@@ -0,0 +1,44 @@
+"""
+민원 이력 DB 저장.
+개인정보 원칙: utterance_masked(마스킹), user_key(SHA-256 해시 16자리).
+원문 미저장.
+"""
+from typing import Optional
+
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.complaint import ComplaintLog
+from app.services.masking import mask_text, hash_user_key
+from app.services.routing import RoutingResult
+
+
+async def log_complaint(
+    db: AsyncSession,
+    tenant_id: str,
+    raw_utterance: str,
+    raw_user_id: str,
+    result: RoutingResult,
+    channel: str = "kakao",
+) -> ComplaintLog:
+    """
+    민원 이력을 ComplaintLog에 기록.
+    - utterance: 마스킹 후 저장
+    - user_key: SHA-256 해시 16자리
+    - 원문 미저장
+    """
+    entry = ComplaintLog(
+        tenant_id=tenant_id,
+        user_key=hash_user_key(raw_user_id),
+        utterance_masked=mask_text(raw_utterance)[:1000],
+        channel=channel,
+        request_id=result.request_id,
+        response_tier=result.tier,
+        response_source=result.source,
+        faq_id=result.faq_id,
+        doc_id=result.doc_id,
+        response_ms=result.elapsed_ms,
+        is_timeout=result.is_timeout,
+    )
+    db.add(entry)
+    await db.commit()
+    return entry