diff --git a/app/api/endpoints.py b/app/api/endpoints.py
index 2417860..28bbfe4 100644
--- a/app/api/endpoints.py
+++ b/app/api/endpoints.py
@@ -43,7 +43,9 @@ async def ingest_file(
     if not file.filename:
         raise HTTPException(status_code=400, detail="File name is required")
 
-    with tempfile.NamedTemporaryFile(delete=True, suffix=file.filename) as tmp:
+    with tempfile.NamedTemporaryFile(
+        delete=False, suffix=file.filename, delete_on_close=True
+    ) as tmp:
         file.file.seek(0)
         shutil.copyfileobj(file.file, tmp)
         tmp.flush()
diff --git a/app/core/config.py b/app/core/config.py
index adf258e..2e0f9bc 100644
--- a/app/core/config.py
+++ b/app/core/config.py
@@ -59,4 +59,5 @@ def get_settings() -> Settings:
 settings = get_settings()
 
 # Set environment variables for third-party libraries
+os.environ["GEMINI_API_KEY"] = settings.GEMINI_API_KEY
 os.environ["TOKENIZERS_PARALLELISM"] = "false"
diff --git a/app/services/config_service.py b/app/services/config_service.py
index cb26769..8bb4197 100644
--- a/app/services/config_service.py
+++ b/app/services/config_service.py
@@ -44,7 +44,7 @@ class ConfigService:
         """
         logger.info("Initializing default models...")
         embedding_model_name = settings.EMBEDDING_MODEL
-        if embedding_model_name not in EmbeddingModelName.__members__:
+        if embedding_model_name not in EmbeddingModelName._value2member_map_:
             logger.warning(
                 "Embedding model '%s' is not valid. Falling back to default '%s'",
                 embedding_model_name,
@@ -60,7 +60,7 @@ class ConfigService:
             getattr(settings, "RERANKER_MODEL", None)
             or RerankerModelName.MiniLMReranker.value
         )
-        if reranker_model_name not in RerankerModelName.__members__:
+        if reranker_model_name not in RerankerModelName._value2member_map_:
             logger.warning(
                 "Reranker model '%s' is not valid. Falling back to default '%s'",
                 reranker_model_name,
@@ -73,7 +73,7 @@ class ConfigService:
         vector_store_name = (
             getattr(settings, "VECTOR_STORE_TYPE", None) or VectorStoreType.PGVECTOR
         )
-        if vector_store_name not in vector_store_registry.list_available():
+        if vector_store_name not in VectorStoreType._value2member_map_:
             logger.warning(
                 "Vector store '%s' is not valid. Falling back to default '%s'",
                 vector_store_name,