DBI-798: Document MySQL Server ID Advanced setting

[pfcoperez]

Summary

Document the addition of the Server ID field for MySQL DB pipes.

Part of: https://linear.app/clickhouse/issue/DBI-798

Checklist

• Delete items not relevant to your PR
• URL changes should add a redirect to the old URL via https://github.com/ClickHouse/clickhouse-docs/blob/main/vercel.json
• If adding a new integration page, also add an entry to the integrations list here: https://github.com/ClickHouse/clickhouse-docs/blob/main/docs/integrations/index.mdx

[vercel]

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Project	Deployment	Actions	Updated (UTC)
clickhouse-docs	Ready	Preview, Comment	Jul 14, 2026 4:16pm

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[mintlify]

Docs PR opened: ClickHouse/ClickHouse#110568

Added a Server ID entry to the MySQL ClickPipe advanced settings documentation, describing its purpose for binlog replication identification.