Promote onAssertionFailure to beta

[brrichards]

Summary

Promotes onAssertionFailure from @alpha to @beta

onAssertionFailure lets apps register a first chance callback that fires immediately before an assertion failure throws.

The API shape is unchanged only the release tag is updated. The comment in fluid-framework/src/index.ts is updated to match, and the affected API report files are regenerated.

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[github-actions]

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Based on the diff (22 lines, 8 files), I've queued these reviewers:

• Correctness — logic errors, race conditions, lifecycle issues
• Security — vulnerabilities, secret exposure, injection
• API Compatibility — breaking changes, release tags, type design
• Performance — algorithmic regressions, memory leaks
• Testing — coverage gaps, hollow tests

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[github-actions]

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[Copilot]

Pull request overview

This PR promotes onAssertionFailure from @alpha to @beta across @fluidframework/core-utils and the fluid-framework bundle, updating the source JSDoc release tag and regenerating the affected API report artifacts.

Changes:

• Updated onAssertionFailure release tag in @fluidframework/core-utils from @alpha to @beta.
• Updated fluid-framework re-export comment for onAssertionFailure to reflect the beta promotion and the import source.
• Regenerated core-utils and fluid-framework API report files to reflect the new release tag.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/framework/fluid-framework/src/index.ts	Updates the comment describing the re-export/import rationale for the now-@beta API.
packages/framework/fluid-framework/api-report/fluid-framework.legacy.beta.api.md	Regenerated API report to include onAssertionFailure as @beta.
packages/framework/fluid-framework/api-report/fluid-framework.beta.api.md	Regenerated API report to include onAssertionFailure as @beta.
packages/framework/fluid-framework/api-report/fluid-framework.alpha.api.md	Regenerated API report showing the promoted @beta tag within the alpha surface.
packages/common/core-utils/src/assert.ts	Promotes the JSDoc release tag for onAssertionFailure to @beta.
packages/common/core-utils/api-report/core-utils.legacy.beta.api.md	Regenerated API report to include onAssertionFailure as @beta.
packages/common/core-utils/api-report/core-utils.beta.api.md	Regenerated API report to include onAssertionFailure as @beta.
packages/common/core-utils/api-report/core-utils.alpha.api.md	Regenerated API report showing the promoted @beta tag within the alpha surface.

[github-actions]

🔗 No broken links found! ✅

Your attention to detail is admirable.

linkcheck output

> fluid-framework-docs-site@0.0.0 ci:check-links /home/runner/work/FluidFramework/FluidFramework/docs
> start-server-and-test "npm run serve -- --no-open" 3000 check-links

1: starting server using command "npm run serve -- --no-open"
and when url "[ 'http://127.0.0.1:3000' ]" is responding with HTTP status code 200
running tests using command "npm run check-links"


> fluid-framework-docs-site@0.0.0 serve
> docusaurus serve --no-open

[SUCCESS] Serving "build" directory at: http://localhost:3000/

> fluid-framework-docs-site@0.0.0 check-links
> linkcheck http://localhost:3000 --skip-file skipped-urls.txt

Crawling...

Stats:
  288641 links
    1922 destination URLs
    2172 URLs ignored
       0 warnings
       0 errors