Develop labeling module (#25)

* refactor: remove db table management from LS adapter (mv to scripts later); change adapter to use the same MySQL DB as other modules.

* refactor: Rename LS Adapter module to datamate-python

runtime/datamate-python/app/models/cleaning/__init__.py

@@ -0,0 +1,13 @@
+# app/models/cleaning/__init__.py
+
+from .clean_template import CleanTemplate
+from .clean_task import CleanTask
+from .operator_instance import OperatorInstance
+from .clean_result import CleanResult
+
+__all__ = [
+    "CleanTemplate",
+    "CleanTask",
+    "OperatorInstance",
+    "CleanResult"
+]