feat(mixin): add TableBaseMixin and UUIDTableBaseMixin for async CRUD operations

- Implemented TableBaseMixin providing generic CRUD methods and automatic timestamp management.
- Introduced UUIDTableBaseMixin for models using UUID as primary keys.
- Added ListResponse for standardized paginated responses.
- Created TimeFilterRequest and PaginationRequest for filtering and pagination parameters.
- Enhanced get_with_count method to return both item list and total count.
- Included validation for time filter parameters in TimeFilterRequest.
- Improved documentation and usage examples throughout the code.

models/tag.py

@@ -1,24 +1,41 @@
-
-from typing import Optional, TYPE_CHECKING
+from enum import StrEnum
+from typing import TYPE_CHECKING
 from uuid import UUID
 from datetime import datetime
 
 from sqlmodel import Field, Relationship, UniqueConstraint, Column, func, DateTime
 
-from .base import TableBase
+from .base import SQLModelBase
+from .mixin import TableBaseMixin
 
 if TYPE_CHECKING:
     from .user import User
 
-class Tag(TableBase, table=True):
+
+class TagType(StrEnum):
+    """标签类型枚举"""
+    MANUAL = "manual"
+    """手动标签"""
+    AUTOMATIC = "automatic"
+    """自动标签"""
+
+
+class Tag(SQLModelBase, TableBaseMixin):
     """标签模型"""
 
     __table_args__ = (UniqueConstraint("name", "user_id", name="uq_tag_name_user"),)
 
-    name: str = Field(max_length=255, description="标签名称")
-    icon: str | None = Field(default=None, max_length=255, description="标签图标")
-    color: str | None = Field(default=None, max_length=255, description="标签颜色")
-    type: int = Field(default=0, sa_column_kwargs={"server_default": "0"}, description="标签类型: 0=手动, 1=自动")
+    name: str = Field(max_length=255)
+    """标签名称"""
+
+    icon: str | None = Field(default=None, max_length=255)
+    """标签图标"""
+
+    color: str | None = Field(default=None, max_length=255)
+    """标签颜色"""
+
+    type: TagType = Field(default=TagType.MANUAL, sa_column_kwargs={"server_default": "'manual'"})
+    """标签类型"""
     expression: str | None = Field(default=None, description="自动标签的匹配表达式")
     
     # 外键