Refactor Workflow and Chat Architecture (#68)

* refactor: overhaul workflow and chat architecture

- Separate Chat and Workflow API endpoints and database models
- Use JSONB to store workflow execution context in Postgres
- Convert workflow engine to use pydantic-ai execution graphs inside a Ray task
- Update frontend React components to support standalone workflow creation
- Remove obsolete and broken workflow runner tests

Co-authored-by: zhaoxi826 <198742034+zhaoxi826@users.noreply.github.com>

* refactor: overhaul workflow and chat architecture

- Separate Chat and Workflow API endpoints and database models
- Use JSONB to store workflow execution context in Postgres
- Convert workflow engine to use pydantic-ai execution graphs inside a Ray task
- Update frontend React components to support standalone workflow creation
- Remove obsolete and broken workflow runner tests

Co-authored-by: zhaoxi826 <198742034+zhaoxi826@users.noreply.github.com>

* refactor: overhaul workflow and chat architecture

- Separate Chat and Workflow API endpoints and database models
- Use JSONB to store workflow execution context in Postgres
- Convert workflow engine to use pydantic-ai execution graphs inside a Ray task
- Update frontend React components to support standalone workflow creation
- Move workflow_engine inside workflow package to keep core root clean
- Remove obsolete and broken workflow runner tests

Co-authored-by: zhaoxi826 <198742034+zhaoxi826@users.noreply.github.com>

---------

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
Co-authored-by: zhaoxi826 <198742034+zhaoxi826@users.noreply.github.com>

kilostar/core/individual/consciousness_node/template.py

@@ -13,7 +13,7 @@
 #  limitations under the License.
 
 
-from kilostar.core.workflow_running_engine.workflow import kilostarWorkflow, WorkStep
+from kilostar.core.work.workflow.workflow import KiloStarWorkflow, WorkflowStep
 from kilostar.utils.agent_model import ResponseModel, DepsModel, InputModel
 from pydantic import Field
 
@@ -28,7 +28,7 @@ class ConsciousnessNodeResponse(ResponseModel):
 class ForWorkflowEngine(ConsciousnessNodeResponse):
     """生成workflow并放入WorkflowEngine"""
 
-    workflow: kilostarWorkflow = Field(
+    workflow: KiloStarWorkflow = Field(
         ..., description="生成好的符合规范的完整工作流对象。"
     )
     reasoning: str = Field(..., description="生成此工作流的原因和思路简述。")
@@ -76,7 +76,7 @@ class ForWorkflowInput(ConsciousnessNodeInput):
     """ForWorkflowInput 核心组件类。
     这是一个领域数据模型或功能封装类，承载了 ForWorkflowInput 相关的内聚属性定义与状态维护。它的存在隔离了局部的业务复杂性，并对外提供了类型安全的访问接口。"""
 
-    workflow_step: WorkStep
+    workflow_step: WorkflowStep
     original_command: str
 
 
@@ -84,5 +84,5 @@ class ForregulatoryInput(ConsciousnessNodeInput):
     """ForregulatoryInput 核心组件类。
     这是一个领域数据模型或功能封装类，承载了 ForregulatoryInput 相关的内聚属性定义与状态维护。它的存在隔离了局部的业务复杂性，并对外提供了类型安全的访问接口。"""
 
-    workflow: kilostarWorkflow
+    workflow: KiloStarWorkflow
     original_command: str