v1.18.1

Fixed

• Fan-out report race — real-world finding: every delegate wrote the same
  <workspace>/.oc-report.md, so parallel fanOut tasks on one workspace overwrote each
  other's reports and waitAll returned identical report.content for all of them. Reports
  are now per-job files (<workspace>/.oc-reports/<jobId>.md): the contract template gains a
  ${reportPath} placeholder, delegate/fanOut prompts pin the exact path for their job, the
  empty-output nudges repeat it, and wait/waitAll read the job-specific file first (the
  legacy root .oc-report.md remains a read fallback). The hygiene reaper now also collects
  stale files under .oc-reports/ and removes the directory once empty.