chore: gardener housekeeping 2026-03-22
- Update all AGENTS.md watermarks to HEAD (5f01d55)
- Add feeDestinationLocked and recenterAccess removal to onchain/AGENTS.md guardrails
- Add gardener/dust.jsonl accumulator (6 dust items: onchain comments, evidence schema docs)
Issues actioned via API:
- Closed #1085 as duplicate of #1082
- Promoted #1079, #1082, #1084 to backlog with acceptance criteria
- Unblocked #607, #609, #610, #611, #614, #615 (dev-crash blockers, no technical blockers)
- Added dependency-resolved comment to #1054 (dep #970 now closed)
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