Bump fastapi from 0.95.0 to 0.109.1 in /app

Bumps [fastapi](https://github.com/tiangolo/fastapi) from 0.95.0 to 0.109.1.
- [Release notes](https://github.com/tiangolo/fastapi/releases)
- [Commits](fastapi/fastapi@0.95.0...0.109.1)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

app/requirements.txt

@@ -1,4 +1,4 @@
-fastapi==0.95.0
+fastapi==0.109.1
 uvicorn==0.21.1
 psycopg2-binary==2.9.5
 SQLAlchemy==2.0.7