chore(deps): update dependency fastapi to v0.120.4 (#6432)

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

Author: renovate[bot]

server/requirements.txt

@@ -1,6 +1,6 @@
 aiofiles==25.1.0
 gitpython==3.1.45
-fastapi==0.119.1
+fastapi==0.120.4
 python-multipart==0.0.20
 pygments==2.19.2
 uvicorn[standard]==0.38.0