From fb25b330fbf1786b4c15f0bad7f6c5af40c7c11a Mon Sep 17 00:00:00 2001
From: Churchill Elisha <69218032+cokehill@users.noreply.github.com>
Date: Wed, 29 Jul 2026 12:57:35 +0100
Subject: [PATCH] feat(contract): add DAO force-cancel, bridge escape hatch,
 dynamic jump-rate curve, and rotation expiry cleanup

- Add governance-gated force_cancel_listing(listing_id) so the DAO
  can remove spam/malicious marketplace listings (tests: happy path
  + non-DAO caller rejection)
- Add timelocked escape hatch for stranded bridge assets: 7-day
  challenge window + admin-signed clawback (tests: scenarios, Kani
  harness, SDK + docs)
- Replace linear (utilisation / 50) interest model with configurable
  jump-rate curve (kink at 80% utilisation, 2x slope above kink)
  (tests: property tests around kink, SDK helpers, docs)
- Fix pending admin key rotation expiry handling: expired requests
  are now pruned and audit-logged instead of left stale (tests:
  cargo test expiry case, Kani harness, doc note)

Closes #824, #820, #825, #821
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