chore: release v0.7.99

[miguel-heygen]

What

Stable release v0.7.99, containing the CLI publish recovery fix from #3087.

Publishing now retries one brief transport failure during upload and reports which boundary failed when recovery is exhausted. Long timeouts, direct publish, and completion remain single-shot; signed upload query credentials are redacted from diagnostics.

Release contents

• Retry transient failures only for staged prepare and the idempotent presigned S3 PUT.
• Add a fixed 200ms retry delay and fresh request bodies/signals per attempt.
• Preserve single-shot semantics for timeout, direct publish, and completion paths.
• Surface stage, cause, code, syscall, errno, and conditional proxy guidance without leaking signed URL queries.
• Publish reviewed v0.7.99 notes and bump all 13 packages plus 3 plugin manifests.

Local validation

• bun run test:scripts — 138/138 pass.
• bunx oxfmt --check — all 18 release files clean.
• Stable release-channel validation — 0.7.99 → latest, PR branch accepted.
• bun run build — all packages and SDK playground pass.
• bun run verify:packed-manifests — 13 packages publish-safe; 108 exports resolved, 103 Node exports executed, clean consumer install and CLI startup verified.

Publish path

Merge through the normal stable-release workflow. GitHub Actions checks out the exact merge SHA, creates v0.7.99 there, publishes npm with the latest tag, and creates the GitHub release. The local annotated tag was deliberately not pushed.

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