feat(auth): migrate to Keycloak metadata auth

app/core/config.py

@@ -11,14 +11,6 @@ class Settings(BaseSettings):
 
     NETWORK_NAME: str = "default_network"
 
-    # JWT 配置
-    SECRET_KEY: str = (
-        "your-secret-key-here-change-in-production-use-openssl-rand-hex-32"
-    )
-    ALGORITHM: str = "HS256"
-    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
-    REFRESH_TOKEN_EXPIRE_DAYS: int = 7
-
     # 数据加密密钥 (使用 Fernet)
     ENCRYPTION_KEY: str = ""  # 必须从环境变量设置
     DATABASE_ENCRYPTION_KEY: str = ""  # project_databases.dsn_encrypted 专用
@@ -59,7 +51,7 @@ class Settings(BaseSettings):
     PROJECT_TS_POOL_MIN_SIZE: int = 1
     PROJECT_TS_POOL_MAX_SIZE: int = 10
 
-    # Keycloak JWT (optional override)
+    # Keycloak access token verification
     KEYCLOAK_PUBLIC_KEY: str = ""
     KEYCLOAK_ALGORITHM: str = "RS256"
     KEYCLOAK_AUDIENCE: str = ""