feat(prompt-optimizer): add prompt optimization APIs and database tables

- Added API endpoints for prompt optimization:
  * POST /prompt/sessions: Create a new prompt optimization session
  * GET /prompt/sessions/{session_id}: Retrieve session message history
  * POST /prompt/sessions/{session_id}/messages: Send message and get optimized prompt
  * PUT /prompt/model: Create or update system prompt model configuration

- Added database models for prompt optimization:
  * prompt_opt_session: Stores session metadata
  * prompt_opt_session_history: Stores session message history
  * prompt_opt_message: Stores user and assistant messages
  * prompt_opt_model_config: Stores system prompt model configurations

- Updated service layer to handle message creation, prompt optimization, and variable parsing
- Added corresponding Pydantic schemas for request and response validation

api/app/controllers/__init__.py

@@ -28,6 +28,7 @@ from . import (
     public_share_controller,
     multi_agent_controller,
     workflow_controller,
+    prompt_optimizer_controller
 )
 
 # 创建管理端 API 路由器
@@ -58,5 +59,6 @@ manager_router.include_router(public_share_controller.router)  # 公开路由（
 manager_router.include_router(memory_dashboard_controller.router)
 manager_router.include_router(multi_agent_controller.router)
 manager_router.include_router(workflow_controller.router)
+manager_router.include_router(prompt_optimizer_controller.router)
 
 __all__ = ["manager_router"]