Bump alembic from 1.16.3 to 1.18.1 in /core

[dependabot]

Bumps alembic from 1.16.3 to 1.18.1.

Release notes

Sourced from alembic's releases.

1.18.1

Released: January 14, 2026

bug

• [bug] [autogenerate] Fixed issue in new plugin system where the configured logger was not correctly using the __name__ token to identify the logger.

  References: #1779

• [bug] [operations] Revised the change regarding SQLAlchemy 2.1 and deprecation warnings related to isolate_from_table=True. Further developments in release 2.1 have revised how this parameter will be modified.

1.18.0

Released: January 9, 2026

feature

• [feature] [operations] When alembic is run in "verbose" mode, alembic now logs a message to indicate from which file is used to load the configuration.

  References: #1737

• [feature] [autogenerate] Autogenerate reflection sweeps now use the "bulk" inspector methods introduced in SQLAlchemy 2.0, which for selected dialects including PostgreSQL and Oracle use batched queries to reflect whole collections of tables using O(1) queries rather than O(N).

  References: #1771

• [feature] [autogenerate] Release 1.18.0 introduces a plugin system that allows for automatic loading of third-party extensions as well as configurable autogenerate compare functionality on a per-environment basis.

  The Plugin class provides a common interface for extensions that register handlers among Alembic's existing extension points such as Operations.register_operation() and Operations.implementation_for(). A new interface for registering autogenerate comparison handlers, Plugin.add_autogenerate_comparator(), provides for autogenerate compare functionality that may be custom-configured on a per-environment basis using the new EnvironmentContext.configure.autogenerate_plugins parameter.

  The change does not impact well known Alembic add-ons such as

... (truncated)

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