fix: 业务层缺陷修复 5 项

1. process_message_stream 补齐 tenant_id  知识库搜索和流式生成都按租户隔离
2. 三个模型补齐 tenant_id  WorkOrderSuggestion/WorkOrderProcessHistory/VehicleData
3. 删除 @resolve_tenant_id 死代码装饰器（未来在 Repository 层统一处理）
4. 删除前端死代码  app.js/app-new.js/main.js/chat.js/chat_http.js + HTML 引用清理
5. 飞书长连接 sender_id 调试日志删除

src/core/database.py

@@ -95,6 +95,9 @@ class DatabaseManager:
                     ('users', 'tenant_id', "VARCHAR(50) DEFAULT 'default'"),
                     ('alerts', 'tenant_id', "VARCHAR(50) DEFAULT 'default'"),
                     ('analytics', 'tenant_id', "VARCHAR(50) DEFAULT 'default'"),
+                    ('work_order_suggestions', 'tenant_id', "VARCHAR(50) DEFAULT 'default'"),
+                    ('work_order_process_history', 'tenant_id', "VARCHAR(50) DEFAULT 'default'"),
+                    ('vehicle_data', 'tenant_id', "VARCHAR(50) DEFAULT 'default'"),
                 ]
                 for table_name, col_name, col_type in migrations:
                     if table_name in inspector.get_table_names():

src/core/models.py

@@ -183,6 +183,7 @@ class VehicleData(Base):
     __tablename__ = "vehicle_data"
 
     id = Column(Integer, primary_key=True)
+    tenant_id = Column(String(50), nullable=False, default=DEFAULT_TENANT, index=True)
     vehicle_id = Column(String(50), nullable=False)  # 车辆ID
     vehicle_vin = Column(String(17))  # 车架号
     data_type = Column(String(50), nullable=False)  # 数据类型（位置、状态、故障等）
@@ -237,6 +238,7 @@ class WorkOrderSuggestion(Base):
     __tablename__ = "work_order_suggestions"
 
     id = Column(Integer, primary_key=True)
+    tenant_id = Column(String(50), nullable=False, default=DEFAULT_TENANT, index=True)
     work_order_id = Column(Integer, ForeignKey("work_orders.id"), nullable=False)
     ai_suggestion = Column(Text)
     human_resolution = Column(Text)
@@ -251,6 +253,7 @@ class WorkOrderProcessHistory(Base):
     __tablename__ = "work_order_process_history"
 
     id = Column(Integer, primary_key=True)
+    tenant_id = Column(String(50), nullable=False, default=DEFAULT_TENANT, index=True)
     work_order_id = Column(Integer, ForeignKey("work_orders.id"), nullable=False)
 
     # 处理人员信息