fix(release): allow measured improvement lifecycle duration

[drewstone]

Problem: v0.96.0 publishing stopped before npm because two full-lifecycle tests exceeded Vitest's five-second default under shared GitHub runner load.

Solution: give only those two measured lifecycle tests a 15-second bound and cut v0.96.1. No runtime behavior changes.

Local proof:

• pnpm test: 148/148 files; 1,558 passed; 2 skipped
• pnpm typecheck
• pnpm build
• pnpm lint: 432 files
• pnpm verify:package
• merge-tree against origin/main is clean

[tangletools]

✅ Auto-approved drewstone PR — 96f03e57

This PR was opened by the trusted drewstone account.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: drewstone_author · 2026-07-18T03:26:48Z}