refactor: unify 4 isolated SQLAlchemy Base instances to database.models.Base

- database/import_models.py: 移除 ext.declarative.declarative_base，改用 from database.models import Base
- database/notification_models.py: 同上
- database/ppt_reports.py: 移除 orm.declarative_base，改用共用 Base
- database/vendor_models.py: 同上
- database/manager.py: 加入 4 個模型的 noqa import，確保 Base.metadata 完整管理所有資料表

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

database/import_models.py

@@ -5,7 +5,7 @@
 """
 
 from sqlalchemy import Column, Integer, String, DateTime, Text, Float
-from sqlalchemy.ext.declarative import declarative_base
+from database.models import Base
 from datetime import datetime
 import pytz
 
@@ -18,9 +18,6 @@ def taipei_now():
     return datetime.now(TAIPEI_TZ).replace(tzinfo=None)
 
 
-Base = declarative_base()
-
-
 class ImportJob(Base):
     """匯入任務模型"""
     __tablename__ = 'import_jobs'

database/manager.py

@@ -9,6 +9,10 @@ from .edm_models import PromoProduct  # V-Fix: 確保 EDM 模型被註冊，以
 from .trend_models import TrendRecord, TrendKeyword, TrendAnalysis, WebSearchCache, TelegramUser  # noqa: F401 - 趨勢資料表
 from .ai_models import AgentContext, ActionPlan, ActionOutcome, AgentStrategyWeights  # noqa: F401 - AI agent 模型
 from .autoheal_models import Incident, Playbook, HealLog  # noqa: F401 - ADR-013 AIOps 自動修復表
+from .import_models import ImportJob  # noqa: F401 - 確保 import_jobs 表被 Base.metadata 管理
+from .notification_models import NotificationTemplate  # noqa: F401 - 確保 notification_templates 表被 Base.metadata 管理
+from .ppt_reports import PPTReport  # noqa: F401 - 確保 ppt_reports 表被 Base.metadata 管理
+from .vendor_models import VendorStockout  # noqa: F401 - 確保 vendor_stockout 表被 Base.metadata 管理
 
 # 🚩 導入優化後的日誌管理模組
 from services.logger_manager import SystemLogger

database/notification_models.py

@@ -6,10 +6,9 @@
 """
 
 from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime
-from sqlalchemy.ext.declarative import declarative_base
+from database.models import Base
 from datetime import datetime, timezone, timedelta
 
-Base = declarative_base()
 TAIPEI_TZ = timezone(timedelta(hours=8))
 
 

database/ppt_reports.py

@@ -4,11 +4,9 @@ PPT 簡報資料庫持久化模型
 """
 
 from sqlalchemy import Column, Integer, String, DateTime, Text, Float
-from sqlalchemy.orm import declarative_base
+from database.models import Base
 from datetime import datetime
 
-Base = declarative_base()
-
 class PPTReport(Base):
     """PPT 簡報記錄表"""
     __tablename__ = 'ppt_reports'

database/vendor_models.py

@@ -6,11 +6,10 @@
 """
 
 from sqlalchemy import Column, Integer, String, DateTime, Boolean, ForeignKey, Numeric, Date, Text
-from sqlalchemy.orm import relationship, declarative_base
+from sqlalchemy.orm import relationship
+from database.models import Base
 from datetime import datetime
 
-Base = declarative_base()
-
 class VendorStockout(Base):
     """廠商缺貨表 - 儲存匯入的缺貨資料"""
     __tablename__ = 'vendor_stockout'