v0.8.0

Added

• actions/apply-proposal composite action: copies a proposal's mapped
  Issue Fields onto its parent (type/parent/labels handled as
  reserved names via native Issue Type, sub-issue, and Label mutations),
  then closes the proposal and any open sibling proposals of the same
  parent. Idempotent — a no-op against an already-closed proposal.
• actions/reject-proposal composite action: closes a proposal, nothing
  else.

Changed

• proposal-shared.yml's apply and reject jobs now run the actions
  above instead of a placeholder notice.