Update dependency fastapi to v0.120.4 (#483)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

languages/python.org/fastapi/pyproject.toml

@@ -6,7 +6,7 @@ readme = "README.md"
 requires-python = "==3.14.0"
 dependencies = [
     "black==25.9.0",
-    "fastapi==0.109.1",
+    "fastapi==0.120.4",
     "httpx==0.28.1",
     "ruff==0.14.3",
     "uvicorn==0.38.0",