feat: 重构数据库导入路径，移除旧的数据库模块并添加新的数据库实现

src/chat/memory_system/Hippocampus.py

@@ -10,7 +10,7 @@ import jieba
 import networkx as nx
 import numpy as np
 from collections import Counter
-from ...common.database import db
+from ...common.database.database import db
 from ...chat.models.utils_model import LLMRequest
 from src.common.logger_manager import get_logger
 from src.chat.memory_system.sample_distribution import MemoryBuildScheduler  # 分布生成器

src/chat/memory_system/manually_alter_memory.py

@@ -34,7 +34,7 @@ root_path = os.path.abspath(os.path.join(os.path.dirname(__file__), "../../.."))
 sys.path.append(root_path)
 
 from src.common.logger import get_module_logger  # noqa E402
-from src.common.database import db  # noqa E402
+from common.database.database import db  # noqa E402
 
 logger = get_module_logger("mem_alter")
 console = Console()