Release: Prerelease 10.5.0-alpha.6

[github-actions]

This is an automated pull request that bumps the version from `10.5.0-alpha.5` to `10.5.0-alpha.6`.
Once this pull request is merged, it will trigger a new release of version `10.5.0-alpha.6`.
If you're not a core maintainer with permissions to release you can ignore this pull request.

To do

Before merging the PR, there are a few QA steps to go through:

• Add the "freeze" label to this PR, to ensure it doesn't get automatically forced pushed by new changes.
• Add the "ci:daily" label to this PR, to trigger the full test suite to run on this PR.

And for each change below:

1. Ensure the change is appropriate for the version bump. E.g. patch release should only contain patches, not new or de-stabilizing features. If a change is not appropriate, revert the PR.
2. Ensure the PR is labeled correctly with one of: "BREAKING CHANGE", "feature request", "bug", "maintenance", "dependencies", "documentation", "build", "unknown".
3. Ensure the PR title is correct, and follows the format "[Area]: [Summary]", e.g. "React: Fix hooks in CSF3 render functions". If it is not correct, change the title in the PR.
   • Areas include: React, Vue, Core, Docs, Controls, etc.
   • First word of summary indicates the type: “Add”, “Fix”, “Upgrade”, etc.
   • The entire title should fit on a line

This is a list of all the PRs merged and commits pushed directly to `next`, that will be part of this release:

• 🔧 Maintenance: Open Service: Call remote commands in load functions #35106
• 🔧 Maintenance: Module Graph: Refactor from StoryDependencyService to open service-based ModuleGraphService #35048
• 🐛 Bug: Preview: Stop mixed CSF3+4 stories getting core annotations injected twice #35094 (will also be patched)
• 🐛 Bug: React: Fix subcomponent prop extraction without JSX usage #35107
• 🐛 Bug: Manager: Keep local preview iframe on host URL when a ref story loads first #35078
• 🐛 Bug: Viewport: Highlight toolbar button when custom viewport is active #35075
• 🐛 Bug: Controls: Guard normalizeOptions against array labels and prototype chain lookups #34664
• ✨ Feature Request: Interactions: Prevent debugger controls from stealing focus #35073
• 🔧 Maintenance: Open Service: Add `internal` property to control visibility #35057
• 🔧 Maintenance: Webpack: Gate lazy-compilation import pipeline on webpack version #34931
• 🔧 Maintenance: Docs: Deprecate ExternalDocs #35074
• 🐛 Bug: Core: Fix resolveImport TSX fallback #34815
• 🐛 Bug: Telemetry: Add timeout to event-log POST to prevent build hang #35085 (will also be patched)
• 🐛 Bug: Core: Rework AI checklist feature gate #35053
• ✨ Feature Request: Open Service: Add sync between server, manager and preview #35017
• 🔧 Maintenance: Core: Add ref-based components manifest index backed by docgen open service #35063
• 🏗️ Build: CI: Add missing changelog entry following CI failure #35122
• 🏗️ Build: CI: Fail build when compile leaves uncommitted changes #35123
• 🏗️ Build: Angular: Fix angular/forms version to 21 in sandbox #35112
• 🏗️ Build: Build: Fix bench-packages BigQuery BOOL/STRING type error #35100
• 🏗️ Build: CI: Restrict trusted CircleCI PR authors to specific teams #34975
• 🏗️ Build: Docs: Add test proving scroll is reset across nav #34973

If you've made any changes doing the above QA (change PR titles, revert PRs), manually trigger a re-generation of this PR with this workflow and wait for it to finish. It will wipe your progress in this to do, which is expected.

Feel free to manually commit any changes necessary to this branch after you've done the last re-generation, following the Make Manual Changes section in the docs, especially if you're making changes to the changelog.

When everything above is done:

• Merge this PR
• Follow the run of the publish action

---

Generated changelog

10.5.0-alpha.6

• Controls: Guard normalizeOptions against array labels and prototype chain lookups - #34664, thanks creazyfrog!
• Core: Add ref-based components manifest index backed by docgen open service - #35063, thanks JReinhold!
• Core: Fix resolveImport TSX fallback - #34815, thanks cyphercodes!
• Core: Rework AI checklist feature gate - #35053, thanks Sidnioulz!
• Docs: Deprecate ExternalDocs - #35074, thanks Sidnioulz!
• Interactions: Prevent debugger controls from stealing focus - #35073, thanks BrenoSI03!
• Manager: Keep local preview iframe on host URL when a ref story loads first - #35078, thanks TheSeydiCharyyev!
• Module Graph: Refactor from StoryDependencyService to open service-based ModuleGraphService - #35048, thanks JReinhold!
• Open Service: Add `internal` property to control visibility - #35057, thanks JReinhold!
• Open Service: Add sync between server, manager and preview - #35017, thanks ndelangen!
• Open Service: Call remote commands in load functions - #35106, thanks JReinhold!
• Preview: Stop mixed CSF3+4 stories getting core annotations injected twice - #35094, thanks JReinhold!
• React: Fix subcomponent prop extraction without JSX usage - #35107, thanks JReinhold!
• Telemetry: Add timeout to event-log POST to prevent build hang - #35085, thanks badams!
• Viewport: Highlight toolbar button when custom viewport is active - #35075, thanks derinbarutcu17!
• Webpack: Gate lazy-compilation import pipeline on webpack version - #34931, thanks copilot-swe-agent!