Update alembic requirement from <2.0,>=1.14 to >=1.18.4,<2.0

[dependabot]

Updates the requirements on alembic to permit the latest version.

Release notes

Sourced from alembic's releases.

1.18.4

Released: February 10, 2026

bug

• [bug] [operations] Reverted the behavior of Operations.add_column() that would automatically render the "PRIMARY KEY" keyword inline when a Column with primary_key=True is added. The automatic behavior, added in version 1.18.2, is now opt-in via the new Operations.add_column.inline_primary_key parameter. This change restores the ability to render a PostgreSQL SERIAL column, which is required to be primary_key=True, while not impacting the ability to render a separate primary key constraint. This also provides consistency with the Operations.add_column.inline_references parameter and gives users explicit control over SQL generation.

  To render PRIMARY KEY inline, use the Operations.add_column.inline_primary_key parameter set to True:

  op.add_column( "my_table", Column("id", Integer, primary_key=True), inline_primary_key=True )References: #1232

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