Update src/backend-api/pyproject.toml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: Dhanushree-Microsoft

src/backend-api/pyproject.toml

@@ -17,8 +17,8 @@ dependencies = [
     "httpx==0.28.1",
     "pydantic-settings==2.10.1",
     "python-dotenv",
-    "python-multipart>=0.0.22",
-    "protobuf>=5.29.0",
+    "python-multipart==0.0.22",
+    "protobuf==5.29.0",
     "sas-cosmosdb==0.1.4",
     "semantic-kernel[azure]==1.40.0",
     "uvicorn==0.35.0",