backstage release v0.149.6

Changed

• Add CLAUDE.md guidance on telemetry page tracking and Sentry log levels (#1873) [skip ci] in #1873 by @marians
• (deps) Update assistant-ui packages in #1865 by @renovate[bot]

Full Changelog: https://github.com/giantswarm/backstage/compare/v0.149.5...v0.149.6