Add Python clickhouse-migrations to schema migration tools (and disambiguate the Node.js entry)

[zifter]

Summary

The Schema migration tools for ClickHouse knowledge-base page lists clickhouse-migrations in the "Other Tools in the Ecosystem" table, but the link points to the npm / Node.js package. There is a separate, actively maintained Python project of the same name that isn't represented:

• PyPI: https://pypi.org/project/clickhouse-migrations/
• Source: https://github.com/zifter/clickhouse-migrations

This PR:

• Renames the existing row to clickhouse-migrations (Node.js) so the name collision between the two projects is explicit.
• Adds clickhouse-migrations (Python) — a file-based schema migration runner available both as a CLI and as a Python library, with single-node and cluster (ON CLUSTER / replicated) support, --dry-run and --fake modes, and multi-statement migration files. Supports Python 3.9–3.14, MIT licensed.

Only the one table in knowledgebase/schema_migration_tools.md is changed; no other content is touched.

Why

Readers searching for a Python-native ClickHouse migration tool currently see only Houseplant and Alembic, and the same-named Node.js entry is easy to mistake for the Python package. Disambiguating the name and listing the Python project makes the ecosystem table accurate and more useful.

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Project	Deployment	Actions	Updated (UTC)
clickhouse-docs	Ready	Preview	Jul 2, 2026 3:55pm

[dhtclk]

@zifter - Thanks for the contribution!

[mintlify]

Docs PR opened: ClickHouse/mintlify-docs-dev#320

Disambiguated the existing clickhouse-migrations entry as Node.js and added a new Python clickhouse-migrations entry to the schema migration tools list.