physics: bind issue 1228 slice 3 unit carriers

[neuron7xLab]

What

Closes the highest-priority unit-contract carrier debt left open after #1353.

Binds issue #1228 tasks 18–22 to durable carriers and repairs the stale repository-integrity invariant witness count.

Scope

• Task 18: explicit dt row in docs/physics/units_table.md.
• Task 19: artifact-only unit verdict under artifacts/physics_validation/.
• Task 20: unit smoke-test carrier link.
• Task 21: dimensional homogeneity test link.
• Task 22: pass/fail summary field in the artifact verdict.
• CI debt: scripts/ci/prove_repo_integrity.sh now expects the current invariant count 132 instead of stale 112.
• Commit acceptor under .claude/commit_acceptors/ binds every changed file.

Tracking issue: #1356.

Non-claims

• Score remains 81.5.
• No target interval claim.
• No final physics validation claim.
• Static unit labels remain bookkeeping contracts, not promoted physics-invariant witnesses.

Verification

python -m json.tool artifacts/physics_validation/issue_1228_slice3_unit_contract_verdict.json
grep -q '| `dt` |' docs/physics/units_table.md
grep -q "132" scripts/ci/prove_repo_integrity.sh
python -m pytest tests/physics/test_dimensional_homogeneity.py -q
python scripts/ci/check_acceptor_command_syntax.py

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

P2 valid: exact carrier check required

The generic grep -q "dt" remains too weak because docs/physics/units_table.md contains other dt occurrences. Do not resolve this until .claude/commit_acceptors/issue-1228-slice3-unit.yaml itself checks:

grep -F -q '| `dt` |' docs/physics/units_table.md

[neuron7xLab]

Fixed in 4f49403387690f5e5c86fb765c00114edd5325c1.

The acceptor no longer uses generic grep -q "dt". It now constructs and checks the exact row carrier string via Python, so unrelated dt occurrences cannot satisfy the falsifier.

Also narrowed scripts/ci/prove_repo_integrity.sh back to the original structure with only the intended invariant witness update 112 -> 132.