chore(deps): update dependency fastapi to v0.120.0

Author: renovate[bot]

api/requirements.txt

@@ -2,7 +2,7 @@ alembic==1.17.0
 assemblyline-client==4.9.8
 aws-lambda-powertools==2.43.1
 boto3==1.40.55
-fastapi==0.119.1
+fastapi==0.120.0
 mangum==0.19.0
 pydantic-settings==2.11.0
 psycopg2-binary==2.9.11