build(deps): bump fastapi-users from 13.0.0 to 15.0.2 in /docker/api

Bumps [fastapi-users](https://github.com/fastapi-users/fastapi-users) from 13.0.0 to 15.0.2.
- [Release notes](https://github.com/fastapi-users/fastapi-users/releases)
- [Commits](fastapi-users/fastapi-users@v13.0.0...v15.0.2)

---
updated-dependencies:
- dependency-name: fastapi-users
  dependency-version: 15.0.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docker/api/requirements.txt

@@ -2,7 +2,7 @@ cloudevents==1.9.0
 beanie == 1.29.0
 fastapi[all]==0.115.0
 fastapi-pagination==0.12.30
-fastapi-users[beanie, oauth]==13.0.0
+fastapi-users[beanie, oauth]==15.0.2
 fastapi-versioning==0.10.0
 MarkupSafe==2.0.1
 motor==3.6.0