v0.2.4 — telegram-dev

• Validate the owner board's table shape, unique task IDs and immediate Markdown
  separator before accepting a change.
• Validate the release job's full-history checkout and refusing ancestry check;
  reject unsupported or ambiguous workflow shapes. Forty-two process controls
  cover hostile edits and valid board/workflow forms.
• Run complete hosted validation nightly at 23:00 Europe/Warsaw or once for an
  explicitly frozen draft-to-ready candidate. Tag releases retain their existing
  validation and publication checks.