add fields extension to app

Author: jonhealy1

stac_fastapi/elasticsearch/stac_fastapi/elasticsearch/app.py

@@ -15,7 +15,8 @@
 from stac_fastapi.elasticsearch.database_logic import create_collection_index
 from stac_fastapi.elasticsearch.extensions import QueryExtension
 from stac_fastapi.elasticsearch.session import Session
-from stac_fastapi.extensions.core import (  # FieldsExtension,
+from stac_fastapi.extensions.core import (
+    FieldsExtension,
     ContextExtension,
     FilterExtension,
     SortExtension,
@@ -67,7 +68,7 @@ class FixedQueryExtension(QueryExtension):
 extensions = [
     TransactionExtension(client=TransactionsClient(session=session), settings=settings),
     BulkTransactionExtension(client=BulkTransactionsClient(session=session)),
-    # FieldsExtension(),
+    FieldsExtension(),
     FixedQueryExtension(),
     FixedSortExtension(),
     TokenPaginationExtension(),