chore: delete demo_auth_enabled from config

.env.example

@@ -14,8 +14,6 @@ MYSQL_PASSWORD=change-me
 MYSQL_DATABASE=model_platform
 DATABASE_URL=mysql+asyncmy://root:change-me@127.0.0.1:3306/model_platform?charset=utf8mb4
 
-# Demo login is only intended for this self-hosted development UI.
-DEMO_AUTH_ENABLED=true
 JWT_SECRET=change-this-development-secret
 
 # ============================================================================

common/src/common/config.py

@@ -39,10 +39,6 @@ class Settings(BaseSettings):
         default="dev-only-not-for-production",
         description="HS256 secret used by backend's jupyter auth_request.",
     )
-    demo_auth_enabled: bool = Field(
-        default=False,
-        description="Enable the self-hosted UI's short-lived demo session cookie.",
-    )
     cookie_force_secure: bool = Field(
         default=False,
         description=(

docker-compose.yml

@@ -81,7 +81,6 @@ services:
       SERVICE_NAME: model-platform-backend
       SCHEDULE_EVENT_NAMESPACE: ${SCHEDULE_EVENT_NAMESPACE:-model-platform-local}
       JWT_SECRET: ${JWT_SECRET:?JWT_SECRET is required}
-      DEMO_AUTH_ENABLED: ${DEMO_AUTH_ENABLED:-false}
       INITIAL_ADMIN_PASSWORD: ${INITIAL_ADMIN_PASSWORD:-admin12345}
       RUNTIME_API_URL: http://runtime:8000
       # P0-1 fix: shared secret required by /internal/v1/* routes.