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>

tests/core/database/module/user_test.py

@@ -26,6 +26,7 @@ def mock_session_maker():
 async def test_add_user(mock_session_maker, mock_dependencies):
     mock_user_cls, _ = mock_dependencies
     from pretor.core.database.module.user import AuthDatabase
+
     maker, session = mock_session_maker
     db = AuthDatabase(maker)
 
@@ -51,6 +52,7 @@ async def test_add_user(mock_session_maker, mock_dependencies):
 async def test_change_password_success(mock_session_maker, mock_dependencies):
     mock_user_cls, mock_select = mock_dependencies
     from pretor.core.database.module.user import AuthDatabase
+
     maker, session = mock_session_maker
     db = AuthDatabase(maker)
 
@@ -79,6 +81,7 @@ async def test_change_password_success(mock_session_maker, mock_dependencies):
 async def test_change_password_user_not_exist(mock_session_maker, mock_dependencies):
     mock_user_cls, mock_select = mock_dependencies
     from pretor.core.database.module.user import AuthDatabase
+
     maker, session = mock_session_maker
     db = AuthDatabase(maker)
 
@@ -94,10 +97,12 @@ async def test_change_password_user_not_exist(mock_session_maker, mock_dependenc
 async def test_change_password_wrong_password(mock_session_maker, mock_dependencies):
     mock_user_cls, mock_select = mock_dependencies
     from pretor.core.database.module.user import AuthDatabase
+
     maker, session = mock_session_maker
     db = AuthDatabase(maker)
 
     from pretor.utils.access import Accessor
+
     mock_user = MagicMock()
     mock_user.hashed_password = Accessor.hash_password("actual_password")
     mock_exec_result = MagicMock()
@@ -105,6 +110,7 @@ async def test_change_password_wrong_password(mock_session_maker, mock_dependenc
     session.execute = AsyncMock(return_value=mock_exec_result)
 
     from pretor.utils.error import UserPasswordError
+
     with pytest.raises(UserPasswordError):
         await db.change_password("testuser", "old_password", "new_password")
 
@@ -113,6 +119,7 @@ async def test_change_password_wrong_password(mock_session_maker, mock_dependenc
 async def test_delete_user_success(mock_session_maker, mock_dependencies):
     mock_user_cls, mock_select = mock_dependencies
     from pretor.core.database.module.user import AuthDatabase
+
     maker, session = mock_session_maker
     db = AuthDatabase(maker)
 
@@ -134,6 +141,7 @@ async def test_delete_user_success(mock_session_maker, mock_dependencies):
 async def test_delete_user_not_exist(mock_session_maker, mock_dependencies):
     mock_user_cls, mock_select = mock_dependencies
     from pretor.core.database.module.user import AuthDatabase
+
     maker, session = mock_session_maker
     db = AuthDatabase(maker)
 
@@ -149,6 +157,7 @@ async def test_delete_user_not_exist(mock_session_maker, mock_dependencies):
 async def test_login_user_success(mock_session_maker, mock_dependencies):
     mock_user_cls, mock_select = mock_dependencies
     from pretor.core.database.module.user import AuthDatabase
+
     maker, session = mock_session_maker
     db = AuthDatabase(maker)
 
@@ -169,6 +178,7 @@ async def test_login_user_success(mock_session_maker, mock_dependencies):
 async def test_login_user_not_exist(mock_session_maker, mock_dependencies):
     mock_user_cls, mock_select = mock_dependencies
     from pretor.core.database.module.user import AuthDatabase
+
     maker, session = mock_session_maker
     db = AuthDatabase(maker)