fix: update fastapi and uvicorn versions in requirements.txt

requirements.txt

@@ -2,8 +2,8 @@
 # Production uses python:3.11-slim Docker image
 
 # === Core Framework ===
-fastapi>=0.103.0,<0.104.0
-uvicorn[standard]>=0.23.2,<0.24.0
+fastapi>=0.115.2
+uvicorn[standard]>=0.27.0
 pydantic>=2.5.3
 python-multipart>=0.0.6