feat: workflow和chat分离

1，增加了创建workflow的页面
2.删除了event

kilostar/core/postgres_database/postgres.py

@@ -20,8 +20,26 @@ from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
 from sqlalchemy.orm import sessionmaker
 from kilostar.core.postgres_database.model.base import BaseDataModel
 
+# 在 create_all 前显式导入所有 ORM 模型类，确保它们注册到 metadata
+from kilostar.core.postgres_database.model.provider import ProviderModel
+from kilostar.core.postgres_database.model.user import User
+from kilostar.core.postgres_database.model.individual import (
+    BaseIndividualModel,
+    SpecialistIndividualModel,
+    OrdinaryIndividualModel,
+    SpecialIndividualModel,
+)
+from kilostar.core.postgres_database.model.workflow import (
+    Workflow,
+    WorkflowContextModel,
+)
+from kilostar.core.postgres_database.model.chat_history import (
+    ChatHistoryRegister,
+    ChatHistoryMessage,
+)
+from kilostar.core.postgres_database.model.system_node import SystemNodeConfigModel
+
 from .module.individual import IndividualDatabase
-from .module.event import EventDatabase
 from .module.user import AuthDatabase
 from .module.provider import ProviderDatabase
 from .module.system_node import SystemNodeDatabase
@@ -51,7 +69,6 @@ class PostgresDatabase:
         self._auth_database = AuthDatabase(self.async_session_maker)
         self._provider_database = ProviderDatabase(self.async_session_maker)
         self._individual_database = IndividualDatabase(self.async_session_maker)
-        self._event_database = EventDatabase(self.async_session_maker)
         self._system_node_database = SystemNodeDatabase(self.async_session_maker)
         self._workflow_database = WorkflowDatabase(self.async_session_maker)
         self._chat_history_database = ChatHistoryDatabase(self.async_session_maker)
@@ -59,16 +76,13 @@ class PostgresDatabase:
         self.ready_event = asyncio.Event()
 
     async def init_db(self) -> None:
-        """完成 db 模块的启动与依赖初始化。
-        在系统引导或服务拉起阶段被调用，负责建立网络连接、分配基础内存资源及注册核心服务组件。
-        Returns:         (None): 经由当前业务模型加工处理后所输出的具体数据实例或领域模型对象。"""
         try:
             async with self.async_engine.begin() as conn:
                 await conn.run_sync(BaseDataModel.metadata.create_all)
+            print("✅ 数据库表创建/验证完成")
         except Exception as e:
-            # Provide a warning if the database is not accessible, allowing
-            # the app to start up for development/UI tests without crashing immediately.
-            print(f"Warning: Failed to initialize PostgreSQL database: {e}")
+            print(f"❌ 数据库初始化失败: {e}")
+            raise
         finally:
             self.ready_event.set()
 
@@ -242,23 +256,6 @@ class PostgresDatabase:
         await self.ready_event.wait()
         return await self._individual_database.get_all_worker_individual()
 
-    # Event Database Methods
-    async def upsert_event(self, trace_id: str, event_data_json: str):
-        await self.ready_event.wait()
-        return await self._event_database.upsert_event(trace_id, event_data_json)
-
-    async def get_event(self, trace_id: str):
-        await self.ready_event.wait()
-        return await self._event_database.get_event(trace_id)
-
-    async def get_all_events(self):
-        await self.ready_event.wait()
-        return await self._event_database.get_all_events()
-
-    async def delete_event(self, trace_id: str):
-        await self.ready_event.wait()
-        return await self._event_database.delete_event(trace_id)
-
     # Workflow Database Methods
     async def create_workflow(
         self, trace_id: str, user_id: str, title: str, command: str