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/operator/__init__.py

@@ -0,0 +1,11 @@
+# app/models/operator/__init__.py
+
+from .operator import Operator
+from .operator_category import OperatorCategory
+from .operator_category_relation import OperatorCategoryRelation
+
+__all__ = [
+    "Operator",
+    "OperatorCategory",
+    "OperatorCategoryRelation"
+]