Bump alembic from 1.14.1 to 1.18.4

Bumps [alembic](https://github.com/sqlalchemy/alembic) from 1.14.1 to 1.18.4.
- [Release notes](https://github.com/sqlalchemy/alembic/releases)
- [Changelog](https://github.com/sqlalchemy/alembic/blob/main/CHANGES)
- [Commits](https://github.com/sqlalchemy/alembic/commits)

---
updated-dependencies:
- dependency-name: alembic
  dependency-version: 1.18.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,7 +1,7 @@
 fastapi==0.115.6
 uvicorn[standard]==0.34.0
 sqlalchemy==2.0.36
-alembic==1.14.1
+alembic==1.18.4
 aiosqlite==0.20.0
 celery==5.4.0
 redis==5.2.1