Implementation plan: wave-based decomposition; waves 1-2 decomposed (11 tasks)

docs/plans/implementation.md records the wave structure (core ->
substrate fork || pg engine -> sqlite engine -> contract suite ->
release), the decided points (contract-suite layout = option (a),
engine-tests vs equivalence-suite split, no CI, mem-engine/fuzzing
deferrals surfaced), and the review-gate rhythm.

Wave 1 (foundations): workspace scaffold, core errors/validation,
value types, trait surface, contract-suite scaffold (+ADR-022),
review gate.
Wave 2 (substrate fork): fork scaffold/provenance, connection+watcher
port, queue-op re-derivation on contract v1, provenance/floor close,
review gate.

tasks/fork-provenance-and-floor.md

@@ -0,0 +1,59 @@
+---
+id: fork-provenance-and-floor
+name: Fork provenance register completion + inherited-test floor green
+status: pending
+depends_on: [fork-port-connection-watcher, fork-rederive-queue-ops]
+scope: narrow
+risk: low
+impact: component
+level: implementation
+tags: [wave-2, substrate]
+---
+
+## Description
+
+Close out the fork's bookkeeping and verify the test floor end-to-end
+(ADR-018's adoption discipline; ADR-011's tests clause):
+
+- **`PROVENANCE.md` delta register**: entries for every delta the port
+  actually made, category-tagged per ADR-018's categories — the three
+  watcher deltas (W-1, W-2, dead-man's switch), the table-family
+  rename, the bootstrap re-keying, the drops (recorded as
+  not-ported), the re-derivation (new code, contract-derived names),
+  and any mechanical adaptations the port surfaced that the plan
+  didn't anticipate. Each entry: what, why, the decision citation.
+- **License/provenance cross-check**: the notice matches the actual
+  ported content; the register's revision citation (`f4e53c6`) matches
+  what was actually diffed.
+- **Test floor**: run the full engine-crate test suite (inherited +
+  contract-property) as one gate; fix or explicitly record any
+  inherited test that the deltas legitimately changed (e.g. the
+  dead-man's-switch panic test becomes a watcher-fatal-death test).
+- **Lineage-diff sanity pass**: produce (locally, not committed) the
+  diff of the substrate subtree vs. the honker-core sources at
+  `f4e53c6` and skim it for accidental divergence — anything not
+  covered by a register entry is either fixed or registered. This is
+  the wave-2 review's primary input.
+
+## Acceptance Criteria
+
+- [ ] `PROVENANCE.md` register complete: every delta categorized and
+      cited; no unregistered divergence from the lineage
+- [ ] License notice accurate; revision citation verified
+- [ ] Full substrate test floor green in one run; changed inherited
+      tests documented in the register
+- [ ] Lineage diff skimmed; findings recorded
+
+## References
+
+- docs/architecture/decisions/018-provenance-register-and-cherry-picks.md
+- docs/architecture/decisions/011-sqlite-substrate-fork.md (tests clause)
+- docs/research/quality-read-honker-core.md §6
+
+## Notes
+
+> To be filled by implementation agent
+
+## Summary
+
+> To be filled on completion