Promote clone and receive-pack parity to implemented

[Ismail-elkorchi]

Acceptance Criteria

• clone and receive-pack plumbing parity family MUST be machine-checkable when marked implemented.
• parity roadmap and matrix MUST set clone-receive-pack-plumbing to implemented with matching states.
• an invariant MUST map clone/receive-pack parity requirements to enforceable evidence gates.

Checklist

• Added INV-FEAT-0053 to spec/invariants.yaml with evidence mapping.
• Added INV-FEAT-0053 gate handler in scripts/check.
• Added implemented-state evidence enforcement for clone/receive-pack in scripts/parity_matrix_check.
• Promoted clone/receive-pack state to implemented in spec/parity-roadmap.yaml and docs/parity-matrix.md.
• Ran node scripts/check --runtime=node.

Simulated Role Reviews

Product review

Findings:

• The only remaining partial command family is now promoted with explicit enforcement instead of text-only claims.
• Implemented state now reflects a concrete proof path for clone branch parity and receive-pack behavior.
  Changes made:
• Updated roadmap and parity matrix states for clone/receive-pack to implemented.
• Added invariant coverage entry INV-FEAT-0053.
  Evidence pointers:
• spec/parity-roadmap.yaml
• docs/parity-matrix.md
• spec/invariants.yaml

QA review

Findings:

• Implemented-state validation now fails if clone/receive-pack APIs or baseline-backed tests are missing.
• Existing node tests already provide the necessary counterexample surface for regression detection.
  Changes made:
• Added clone/receive-pack checks in scripts/parity_matrix_check.
• Added INV-FEAT-0053 handler requirements in scripts/check.
  Evidence pointers:
• scripts/parity_matrix_check
• scripts/check
• tests/node/clone-receive-pack.test.mjs

Security review

Findings:

• Gate hardening reduces governance drift risk where implemented labels could outpace verifiable behavior.
• Evidence generation now includes clone/receive-pack invariant artifacts under the active phase.
  Changes made:
• Added new invariant with explicit falsification method and implementation surface mapping.
• Bound invariant enforcement to existing CI check path.
  Evidence pointers:
• spec/invariants.yaml
• scripts/check

Performance review

Findings:

• Changes are policy/gate logic only with no runtime-path overhead in shipped library execution.
• Additional checks run in CI script validation and are bounded to file/text assertions.
  Changes made:
• Extended parity checker with targeted string and regex assertions.
• Kept checks scoped to one test file and API signatures.
  Evidence pointers:
• scripts/parity_matrix_check
• node scripts/check --runtime=node

Maintainer review

Findings:

• Roadmap/matrix/state coherence is now enforced for clone/receive-pack in the same pattern as repo/backfill/replay/last-modified.
• Invariant catalog now covers the newly implemented family with explicit ID tracking.
  Changes made:
• Added required family id assertion for clone-receive-pack.
• Added invariant definition and gate handler for INV-FEAT-0053.
  Evidence pointers:
• scripts/parity_matrix_check
• spec/invariants.yaml
• scripts/check