refactor(core): decouple actors and remove workflow templates (#67)

Removes the deprecated `workflow_template` concept entirely across both backend API routers, internal logic handling within the `supervisory_node` and `consciousness_node`, and front-end components. Enables `consciousness_node` to work autonomously.

Also refactors core package structure to enforce the "one python package, one Ray Actor" architectural rule. `GlobalWorkflowManager`, `WorkflowRunningEngine`, `PostgresDatabase`, and `WorkerCluster` have been moved to their own top-level decoupled package directories with properly exported `__init__.py` modules. Test suites have been relocated and import paths updated across the system.

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>

pretor/core/database/database_exception.py

@@ -17,16 +17,20 @@ from pydantic import ValidationError
 from pretor.utils.error import UserNotExistError
 
 from pretor.utils.logger import get_logger
-logger = get_logger('database_exception')
+
+logger = get_logger("database_exception")
+
+
 def database_exception(func):
     """执行与 database exception 相关的核心业务流转操作。
     该方法封装了具体的算法策略或状态控制逻辑，确保操作能够在事务上下文中被原子且一致地执行。
     Args:        func: 参与 database exception 逻辑运算或数据构建的上下文依赖对象。
-    Returns:        : 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。    """
+    Returns:        : 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。"""
+
     async def wrapper(*args, **kwargs):
         """执行与 wrapper 相关的核心业务流转操作。
         该方法封装了具体的算法策略或状态控制逻辑，确保操作能够在事务上下文中被原子且一致地执行。
-        Returns:        : 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。    """
+        Returns:        : 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:
             return await func(*args, **kwargs)
         except ValidationError as e:
@@ -43,4 +47,5 @@ def database_exception(func):
         except Exception as e:
             logger.exception(f"未预期的数据库错误: {e}")
             raise e
-    return wrapper
+
+    return wrapper