P-0.6: pv lint as its own CI step with --min-score 0.48 (basis=measured mean score 0.48 Grade D at b1a6324b8, #2870 ledger — a floor at the current value, never an aspiration), shrink-onl #2912

DAG row P-0.6 — docs/specifications/pp-066-dag.yaml (epic #2873; spec: #2870 phase 0/1 text (improve-provable-contracts.md not in tree); PP-066 §5 Track P).

Track: P · lane: 0.66 · host: intel (CI runner) for P-0.6, else any · owner: spec-owner · expiry: 2026-09-26 · quorum: review-only

Blockers (rows): P-0.3, DEC-D-11
Linked issues: —

A — acceptance (exit 0 = done):

• the ci.yml step (via scripts/pv_bin.sh) exits 0 at HEAD and prints warnings=1082 score>=0.48
• bash scripts/check_pv_lint_step.sh --selftest (a contract adding one warning -> RED)
• bash scripts/check_baseline_ratchets.sh PASS with the new baseline classified

Contract: contracts/pv-p-0-6-v1.yaml
Mutation → RED: add a hollow contract carrying one new warning -> RED

Filed by the PP-066 driver STEP 5; status tracked in the DAG (status: complete after the receipt docs/audits/impl-<ticket>-receipt.md).