refactor(memory): clean up deprecated config and self-reflexion utilities

- Remove deprecated self_reflexion endpoint from memory_storage_controller
- Delete obsolete config modules (config_optimization, definitions, get_example_data, litellm_config)
- Remove self_reflexion_utils package and related evaluation/reflexion modules
- Refactor hot_memory_tags to use Neo4jConnector instead of direct GraphDatabase connection
- Simplify LLM client initialization by removing DEFAULT_LLM_ID fallback logic
- Remove unnecessary sys.path manipulation and project root resolution code
- Update filter_tags_with_llm to properly handle missing config with clear error messages
- Migrate get_raw_tags_from_db to async function using Neo4jConnector
- Consolidate imports and remove unused dependencies (uuid, sys)
- Improve error handling with explicit ValueError messages for missing configuration

api/app/controllers/memory_storage_controller.py

@@ -1,10 +1,8 @@
 import os
-import uuid
 from typing import Optional
 
 from app.core.error_codes import BizCode
 from app.core.logging_config import get_api_logger
-from app.core.memory.utils.self_reflexion_utils import self_reflexion
 from app.core.response_utils import fail, success
 from app.db import get_db
 from app.dependencies import get_current_user
@@ -458,18 +456,3 @@ async def get_recent_activity_stats_api(
         api_logger.error(f"Recent activity stats failed: {str(e)}")
         return fail(BizCode.INTERNAL_ERROR, "最近活动统计失败", str(e))
 
-
-
-
-@router.get("/self_reflexion")
-async def self_reflexion_endpoint(host_id: uuid.UUID) -> str:
-    """
-    自我反思接口，自动对检索出的信息进行自我反思并返回自我反思结果。
-
-    Args:
-        None
-    Returns:
-        自我反思结果。
-    """
-    return await self_reflexion(host_id)
-