Contract-suite scaffold: alkstore-contract-suite crate + ADR-022 (suite layout decision), engine dev-dep edges (ADR-017 §4.2 discharged, ADR-012 §2 mirror)

docs/architecture/decisions/017-contract-versioning.md

@@ -211,6 +211,11 @@ not a runtime descriptor):
    shared crate, workspace test target, or per-engine module — is a
    test-side convenience decided at implementation
    ([ADR-001](001-crate-split.md) §4's posture for test artifacts).
+   *(Layout resolved 2026-10-07:
+   [ADR-022](022-contract-suite-layout.md) — the shared internal
+   `alkstore-contract-suite` crate; engines take it as a
+   dev-dependency and drive the rows against their own stores via a
+   `StoreFactory` the suite defines.)*
 3. **Engine-crate docs**: each engine's docs state the contract
    version(s) it implements — the same standing-statement altitude
    as its deployment posture (ADR-016 §3's carrier 2).