chore: bump the uv-backend-minor-patch group across 1 directory with 3 updates

Bumps the uv-backend-minor-patch group with 3 updates in the /backend directory: [alembic](https://github.com/sqlalchemy/alembic), [google-genai](https://github.com/googleapis/python-genai) and [greenlet](https://github.com/python-greenlet/greenlet).


Updates `alembic` from 1.18.5 to 1.19.0
- [Release notes](https://github.com/sqlalchemy/alembic/releases)
- [Changelog](https://github.com/sqlalchemy/alembic/blob/main/CHANGES)
- [Commits](https://github.com/sqlalchemy/alembic/commits)

Updates `google-genai` from 2.10.0 to 2.16.0
- [Release notes](https://github.com/googleapis/python-genai/releases)
- [Changelog](https://github.com/googleapis/python-genai/blob/main/CHANGELOG.md)
- [Commits](googleapis/python-genai@v2.10.0...v2.16.0)

Updates `greenlet` from 3.5.3 to 3.5.4
- [Changelog](https://github.com/python-greenlet/greenlet/blob/master/CHANGES.rst)
- [Commits](python-greenlet/greenlet@3.5.3...3.5.4)

---
updated-dependencies:
- dependency-name: alembic
  dependency-version: 1.19.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: uv-backend-minor-patch
- dependency-name: google-genai
  dependency-version: 2.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: uv-backend-minor-patch
- dependency-name: greenlet
  dependency-version: 3.5.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: uv-backend-minor-patch
...

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

Author: dependabot[bot]

backend/pyproject.toml

@@ -5,13 +5,13 @@ description = "Past Exam API Backend"
 readme = "README.md"
 requires-python = ">=3.12"
 dependencies = [
-    "alembic>=1.18.5",
+    "alembic>=1.19.0",
     "arq>=0.25.0",
     "asyncpg>=0.30.0",
     "bcrypt>=4.3.0",
     "fastapi[standard]>=0.141.1",
-    "google-genai>=2.10.0",
-    "greenlet>=3.5.3",
+    "google-genai>=2.16.0",
+    "greenlet>=3.5.4",
     "httpx>=0.28.1",
     "itsdangerous>=2.2.0",
     "minio>=7.2.15",