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/table/table_provider_test.py

@@ -1,5 +1,6 @@
 from pretor.core.database.table.provider import Provider
 
+
 def test_provider_table():
     # Provide required fields
     provider = Provider(
@@ -8,7 +9,7 @@ def test_provider_table():
         provider_apikey="key",
         provider_models=["model_1"],
         provider_type="type",
-        provider_owner=1
+        provider_owner=1,
     )
-    assert Provider.__tablename__ == 'provider'
+    assert Provider.__tablename__ == "provider"
     assert provider.provider_title == "title"

tests/core/database/table/table_user_test.py

@@ -1,6 +1,7 @@
 from pretor.core.database.table.user import User
 
+
 def test_user_table():
     user = User(user_id="id", user_name="name", hashed_password="pw")
-    assert User.__tablename__ == 'user'
+    assert User.__tablename__ == "user"
     assert user.user_name == "name"