VED-736: remove contained and add use official

Author: Akol125

backend/src/models/utils/generic_utils.py

@@ -152,13 +152,9 @@ def form_json(response, _element, identifier, baseurl):
     # Full Immunization payload to be returned if only the identifier parameter was provided
     if identifier and not _element:
         resource = response["resource"]
-
-        # --- filtering: drop contained and add use=official to identifiers ---
         resource.pop("contained", None)
-        if isinstance(resource.get("identifier"), list):
-            for item in resource["identifier"]:
-                if isinstance(item, dict):
-                    item["use"] = "official"
+        if "use" not in response["identifier"][0]:
+            resource["identifier"][0]["use"] = "official"
 
     elif identifier and _element:
         element = {e.strip().lower() for e in _element.split(",") if e.strip()}