chore(postman): regenerate collection from openapi.js (#90)

The committed Postman collection had drifted from the live API
surface since the audit-cycle PRs added 13 bulk endpoints,
/metrics, and the Idempotency-Key header parameter. Regenerated via
the one-liner the README documents:

  node -e "require('fs').writeFileSync('/tmp/oas.json', JSON.stringify(require('./app/config/openapi.js')))" && \
      npx --yes openapi-to-postmanv2 -s /tmp/oas.json -o setup/TimeTrackerAPI.postman_collection.json -p

Request count: 79 → 97.

Co-authored-by: Aaron K. Clark <akclark@thenetwerk.net>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: 3 people