Fix DRIFT search on Azure AI Search (#1645)

* Add vector field to retrievable fields for Azure AI Search

* Add DRIFT and Basic search to smoke tests

* Semver

* Format

* Remove DRIFT smoke test for now (brittle)

Author: natoverse

.semversioner/next-release/patch-20250121205226363912.json

@@ -0,0 +1,4 @@
+{
+  "type": "patch",
+  "description": "Fix DRIFT search on Azure AI Search."
+}

graphrag/vector_stores/azure_ai_search.py

@@ -111,6 +111,7 @@ def load_documents(
                         name="vector",
                         type=SearchFieldDataType.Collection(SearchFieldDataType.Single),
                         searchable=True,
+                        hidden=False,  # DRIFT needs to return the vector for client-side similarity
                         vector_search_dimensions=self.vector_size,
                         vector_search_profile_name=self.vector_search_profile_name,
                     ),

tests/fixtures/min-csv/config.json

@@ -134,6 +134,10 @@
         {
             "query": "What is the major conflict in this story and who are the protagonist and antagonist?",
             "method": "global"
+        },
+        {
+            "query": "Who is Jordan Hayes?",
+            "method": "basic"
         }
     ],
     "slow": false

tests/fixtures/text/config.json

@@ -152,6 +152,10 @@
         {
             "query": "What is the major conflict in this story and who are the protagonist and antagonist?",
             "method": "global"
+        },
+        {
+            "query": "Who is Jordan Hayes?",
+            "method": "basic"
         }
     ],
     "slow": false