Refactor code structure for improved readability and maintainability

Author: Dhanushree-Microsoft

src/backend-api/pyproject.toml

@@ -13,7 +13,7 @@ dependencies = [
     "azure-search-documents==11.7.0b2",
     "azure-storage-blob==12.28.0",
     "azure-storage-queue==12.15.0",
-    "fastapi[standard]==0.135.3",
+    "fastapi[standard]==0.136.0",
     "httpx==0.28.1",
     "pydantic-settings==2.13.1",
     "python-dotenv==1.2.2",
@@ -33,8 +33,8 @@ omit = ["src/tests/*"]
 [tool.uv]
 override-dependencies = [
     "av==16.0.0",
-    "starlette==0.49.1",
-    "aiohttp==3.13.4",
+    "starlette==1.0.1",
+    "aiohttp==3.14.0",
     "azure-core==1.38.0",
     "urllib3==2.7.0",
     "requests==2.33.0",