chore(main): release 12.9.0

[ydb-platform-bot]

🤖 I have created a release beep boop

12.9.0 (2025-10-22)

Features

• add different auth methods for external datasource (#2982) (45732e1)
• Clusters: authorize with meta (#2988) (e5de2d4)
• migrate to gravity-ui/graph (#2735) (2fb30ad)
• render additional footer items in navigation (#2991) (1cff57d)
• ui: support fulltext index (#2962) (11ddc82)
• update js/ts connection example to use new sdk (#2974) (0982a58)

Bug Fixes

• default interface theme is system (#2960) (7020e05)
• keysets (#2963) (5d116e9)
• UserSettings: do not show language setting (#2989) (55a1fc6)

---

This PR was generated with Release Please. See documentation.

CI Results

Test Status: ⚠️ FLAKY

📊 Full Report

Total	Passed	Failed	Flaky	Skipped
378	375	0	1	2

Test Changes Summary ⏭️2

⏭️ Skipped Tests (2)

1. Scroll to row, get shareable link, navigate to URL and verify row is scrolled into view (tenant/diagnostics/tabs/queries.test.ts)
2. Copy result button copies to clipboard (tenant/queryEditor/queryEditor.test.ts)

Bundle Size: ✅

Current: 45.87 MB | Main: 45.87 MB
Diff: 0.00 KB (0.00%)

✅ Bundle size unchanged.

ℹ️ CI Information

• Test recordings for failed tests are available in the full report.
• Bundle size is measured for the entire 'dist' directory.
• 📊 indicates links to detailed reports.
• 🔺 indicates increase, 🔽 decrease, and ✅ no change in bundle size.

[ydb-platform-bot]

🤖 Created releases:

• v12.9.0

🌻