chore: REST skips non-analysis ops via descriptor kind (phase 6b)

Generalizes the producer skip to kind != 'operation' (producers + transformers), read from the
generated method's _facade_kind tag.

Author: jagalindo

flamapy/interfaces/rest/operations_routes.py

@@ -254,8 +254,8 @@ def route_function() -> Any:
 for name, method in inspect.getmembers(FLAMAFeatureModel, predicate=inspect.isfunction):
     if name.startswith('_'):
         continue
-    if isinstance(inspect.getattr_static(FLAMAFeatureModel, name), staticmethod):
-        continue  # producer ops (model generators) need no model; Python-API only for now
+    if getattr(method, '_facade_kind', 'operation') != 'operation':
+        continue  # producers/transformers return models; Python-API only for now
     docstring = extract_docstring_with_swagger_info(method)
     limit = expensive_operation_limit if name in _EXPENSIVE_OPERATIONS else default_operation_limit
     route_view = limiter.limit(limit)(create_route(name, docstring))