v1.2.1

Fixed

• A recursive this.save() / self.save() inside save no longer becomes a
  call edge that code_flow and code_blast resolve to another class's
  save. Run memrain reindex --source code --all to drop existing ones.
• A subagent job refused by the brain or cycle daily cap is deferred to the
  next UTC day and resumed from its ledger, instead of finishing as
  budget_exhausted.
• docs: MEMRAIN_SECRET_SCAN_ALLOW takes 16-hex fingerprints, as the
  redaction marker prints them.