feat: DEVONthink 제거 + 모닝 브리핑 추가

- DEVONthink 의존성 제거 → kb_writer 전환 (news_digest, inbox_processor, mail pipeline)
- devonthink_bridge.py, plist 삭제
- morning_briefing.py 신규 (매일 07:30, 일정·메일·보고·뉴스 → Synology Chat)
- intent_service.py 분류기 프롬프트 개선 + 키워드 fallback
- migrate-v5.sql (news_digest_log kb_path 컬럼)

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

news_digest.py

@@ -20,7 +20,7 @@ GPU_OLLAMA_URL = os.getenv("GPU_OLLAMA_URL", "http://192.168.1.186:11434")
 LOCAL_OLLAMA_URL = os.getenv("LOCAL_OLLAMA_URL", "http://127.0.0.1:11434")
 QDRANT_URL = os.getenv("QDRANT_URL", "http://127.0.0.1:6333")
 SYNOLOGY_CHAT_WEBHOOK_URL = os.getenv("SYNOLOGY_CHAT_WEBHOOK_URL", "")
-DEVONTHINK_BRIDGE_URL = os.getenv("DEVONTHINK_BRIDGE_URL", "http://127.0.0.1:8093")
+KB_WRITER_URL = os.getenv("KB_WRITER_URL", "http://127.0.0.1:8095")
 
 # Postgres 연결 (직접 접속)
 PG_HOST = os.getenv("PG_HOST", "127.0.0.1")
@@ -179,21 +179,24 @@ def embed_to_qdrant(text: str) -> str | None:
         return None
 
 
-def save_to_devonthink(title: str, content: str) -> str | None:
-    """DEVONthink에 저장."""
+def save_to_kb(title: str, content: str) -> str | None:
+    """kb_writer에 저장."""
     try:
         resp = httpx.post(
-            f"{DEVONTHINK_BRIDGE_URL}/save",
+            f"{KB_WRITER_URL}/save",
             json={
                 "title": title,
                 "content": content,
-                "type": "markdown",
+                "type": "news",
                 "tags": ["news", "digest"],
+                "username": "news-digest",
+                "source": "karakeep",
+                "topic": "news",
             },
             timeout=10,
         )
         data = resp.json()
-        return data.get("uuid") if data.get("success") else None
+        return data.get("path") if data.get("success") else None
     except Exception:
         return None
 
@@ -258,7 +261,7 @@ def main():
 
         emb_text = f"{result['title_ko']} {result['summary_ko']}"
         qdrant_id = embed_to_qdrant(emb_text)
-        dt_uuid = save_to_devonthink(
+        kb_path = save_to_kb(
             result["title_ko"],
             f"**원문**: {bm['url']}\n**출처**: {bm.get('source', '')}\n\n{result['summary_ko']}",
         )
@@ -268,9 +271,9 @@ def main():
             try:
                 with conn.cursor() as cur:
                     cur.execute(
-                        "INSERT INTO news_digest_log (article_url,source,original_lang,title_ko,summary_ko,qdrant_id,devonthink_uuid) "
+                        "INSERT INTO news_digest_log (article_url,source,original_lang,title_ko,summary_ko,qdrant_id,kb_path) "
                         "VALUES (%s,%s,%s,%s,%s,%s,%s) ON CONFLICT (article_url) DO NOTHING",
-                        (bm["url"], bm.get("source", ""), lang, result["title_ko"], result["summary_ko"], qdrant_id, dt_uuid),
+                        (bm["url"], bm.get("source", ""), lang, result["title_ko"], result["summary_ko"], qdrant_id, kb_path),
                     )
                 conn.commit()
             except Exception as e: