Bump alembic from 1.14.1 to 1.15.1 (#1217)

Bumps [alembic](https://github.com/sqlalchemy/alembic) from 1.14.1 to 1.15.1.
- [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-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

poetry.lock

@@ -28,7 +28,7 @@ tree-sitter-java = "==0.23.5"
 tree-sitter-javascript = "==0.23.1"
 tree-sitter-python = "==0.23.6"
 tree-sitter-rust = "==0.23.2"
-alembic = "==1.14.1"
+alembic = "==1.15.1"
 pygments = "==2.19.1"
 sqlite-vec-sl-tmp = "==0.0.4"
 greenlet = "==3.1.1"