feat: vault + lending market covenant system (Morpho-style)#26

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tiero wants to merge 15 commits intomasterfrom

claude/arkade-contracts-ZAi2R

Commits on Apr 4, 2026

feat: add vault + lending market contract stack (8 examples)
claude
committed
fix: remove migrate path and upgradeRoot from VaultCovenant
claude
committed
refactor: move vault+lending contracts into examples/vault_lending/ subfolder
claude
committed

Commits on Apr 5, 2026