docs: port content changes from clickhouse-docs#6306

[mintlify]

Summary

Ports non-i18n documentation updates from the upstream Docusaurus PR ClickHouse/clickhouse-docs#6306 into the Mintlify site.

Changes

• UDF page: switch from Private Preview badge to Beta badge, drop private-preview support note, add symlink warning for ZIP uploads.
• Cloud compatibility: UDFs moved from "private preview" to "public beta".
• BYOC privilege reference: rename CloudFormation IAM section to AWS IAM, add new GCP service accounts section (bootstrap + controller-created identities).
• Java JDBC client: tighten "JDBC Type" column widths and update type mappings (Int128/256, UInt8/16/32/64/128/256, Float32, Enum8/16).
• Data lake support matrix: mark Databricks Unity Catalog and Microsoft OneLake as Beta for Create table and INSERT; update read-only caveat to call out those two catalogs.
• New ClickStack demo days page for 2026-05-22 and add to clickstack navigation.

Context

Upstream PR is a Locadex i18n run that also carried these docs/** content changes on the source branch. Only non-i18n, non-gt-lock.json changes are ported. Docusaurus-only frontmatter (sidebar_position, pagination_prev/next) was dropped on the new demo-days page; sidebar_label was converted to sidebarTitle and <iframe> wrapped in <Frame> to match the existing demo-days files.

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Note

Low Risk
Documentation-only edits (status badges, reference tables, new demo-days page); no product code or security behavior changes in this repo.

Overview
Ports upstream documentation updates into Mintlify: Cloud UDFs move from private preview to public beta (badge, compatibility guide, removal of enroll-via-support note) and add a symlink rejection warning for UI ZIP uploads.

The data lake catalog support matrix now marks Databricks Unity Catalog and Microsoft OneLake as Beta for create-table and INSERT, and clarifies that other catalogs remain read-only through the catalog connection.

BYOC privilege docs rename the AWS section and document GCP bootstrap and controller-created service accounts. The Java JDBC reference updates JDBC type mappings (e.g. wide integers, unsigned types, Float32, enums) and tightens mapping tables.

A new ClickStack demo days (2026-05-22) page is added and linked in navigation.

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Project	Status	Preview	Updated (UTC)
ClickHouse-docs	🟢 Ready	View Preview	Jun 1, 2026, 4:59 PM

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Cursor Bugbot has reviewed your changes using default effort and found 1 potential issue.

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[cursor]

Renamed anchor breaks cross-reference in security playbook

Medium Severity

The heading anchor was renamed from #cloudformation-iam-roles to #aws-iam-roles, but byoc-security-playbook.mdx still links to the old anchor at /products/bring-your-own-cloud/reference/privilege#cloudformation-iam-roles. This creates a broken fragment link — the page will load but won't scroll to the intended section, which is confusing for users following a security incident playbook.

 

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