feat: ai-service를 ds923에서 맥미니로 이전

- ChromaDB → Qdrant 전환 (맥미니 기존 인스턴스, tk_qc_issues 컬렉션)
- Ollama 임베딩/텍스트 생성 URL 분리 (임베딩: 맥미니, 텍스트: GPU서버)
- MLX fallback 제거, Ollama 단일 경로로 단순화
- ds923 docker-compose에서 ai-service 제거
- gateway/system3-web nginx: ai-service 프록시를 ai.hyungi.net 경유로 변경
- resolver + 변수 기반 proxy_pass로 런타임 DNS 해석 (컨테이너 시작 실패 방지)

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

ai-service/config.py

@@ -2,16 +2,22 @@ from pydantic_settings import BaseSettings
 
 
 class Settings(BaseSettings):
-    OLLAMA_BASE_URL: str = "https://gpu.hyungi.net"
+    # GPU서버 Ollama (텍스트 생성)
+    OLLAMA_BASE_URL: str = "http://192.168.1.186:11434"
     OLLAMA_TEXT_MODEL: str = "qwen3.5:9b-q8_0"
-    OLLAMA_EMBED_MODEL: str = "bge-m3"
     OLLAMA_TIMEOUT: int = 120
 
-    MLX_BASE_URL: str = "https://llm.hyungi.net"
-    MLX_TEXT_MODEL: str = "/Users/hyungi/mlx-models/Qwen3.5-27B-4bit"
+    # 맥미니 Ollama (임베딩) — OrbStack: host.internal / Docker Desktop: host.docker.internal
+    OLLAMA_EMBED_URL: str = "http://host.internal:11434"
+    OLLAMA_EMBED_MODEL: str = "bge-m3"
 
-    DB_HOST: str = "mariadb"
-    DB_PORT: int = 3306
+    # 맥미니 Qdrant (기존 인스턴스, 회사 전용 컬렉션)
+    QDRANT_URL: str = "http://host.internal:6333"
+    QDRANT_COLLECTION: str = "tk_qc_issues"
+
+    # ds923 MariaDB (Tailscale)
+    DB_HOST: str = "100.71.132.52"
+    DB_PORT: int = 30306
     DB_USER: str = "hyungi_user"
     DB_PASSWORD: str = ""
     DB_NAME: str = "hyungi"
@@ -19,8 +25,8 @@ class Settings(BaseSettings):
     SECRET_KEY: str = ""
     ALGORITHM: str = "HS256"
 
-    SYSTEM1_API_URL: str = "http://system1-api:3005"
-    CHROMA_PERSIST_DIR: str = "/app/data/chroma"
+    # ds923 System1 API (Tailscale)
+    SYSTEM1_API_URL: str = "http://100.71.132.52:30005"
     METADATA_DB_PATH: str = "/app/data/metadata.db"
 
     class Config: