chore: release v0.8.137

[miguel-heygen]

Release v0.8.137 from main commit 4905b4db, including #5103, #5098 and #5099.

Compositions with large inline images or scripts use far less memory while they load for preview. Whisper transcription detects the spoken language and can report progress. Audio clips that reach the export ceiling say "Too loud".

No visible change

This PR changes only version fields and release notes. Runtime changes are in the original fix PRs.

Validation

• Release preparation completed successfully.
• All 18 manifests change only their version, from 0.8.136 to 0.8.137.
• Both reviewed note files include fix(cli): report transcription language and progress #5103, fix(core): bound ASCII folding allocations for large HTML #5098 and fix(studio): make clip peak warnings plain and hoverable #5099, contain no generated review markers, and preserve prior changelog entries.
• Formatting and commit-message hooks pass. No release tag was pushed. The publish workflow tags the merge commit. Base and release-branch CI remain the merge gates.

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Project	Status	Preview	Updated
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[github-actions]

Edit accuracy: accurate 2055 (base branch 2055), smooth 1637 of those

The gate passes.
Smoothness is reported in the artifact, not gated. A case fails only if it fails 2 of 3 runs.

Quarantined, measured but not gated (0)