feat(linkedin-studio): wire contract-gate + ratify into newsletter Step 4.5 (fix #1 slice 3)

Slice 3 of fix #1 (§C2 bindende + akkumulerende): wire the deterministic
§B/§C1 contract-gate into the long-form pipeline as a pre-handoff step, so
mechanical violations die deterministically BEFORE the costly AI gates and
never reach the operator at a judgment gate ("rettelser fester seg").

Newsletter pipeline:
- New Step 4.5 (between Step 4 consistency/quality and Step 5 fact-check):
  (1) ratify the gate (rules.ts <-> §E-manifest 1:1; DRIFT escalates to
  operator, not a draft fix) and (2) gate the draft (exit 0 PASS / exit 1
  BLOCK -> fix by tightening + re-run; WARN = direction, never blocks).
  Adopter-safe: no-op when contract-gate deps / the maskinrommet contract
  are absent.
- Pipeline phase count 16 -> 17 across every LIVE surface (overview table +
  build-status + narrative + banner + schema pointer in newsletter.md;
  command-table rows in CLAUDE.md and README). Historical version-narrative
  entries left untouched.
- edition-state.template.json: new "contract-gate" phase string (Step 4.5),
  between consistency-quality and factcheck-sweep. JSON valid; phases 16->17.

CI integration (test-runner.sh, Section 14 — new):
- 14a: contract-gate suite stays green (npm test exit 0) with a 33-test
  case-count floor (anti-erosion).
- 14b: ratify invariant — rules.ts bound 1:1 to the §E-manifest.
- Both KTG-internal and adopter-safe (warn/skip, never fail, when deps or the
  contract are absent). set +e inside the test command-substitution keeps a
  red suite from aborting the runner; ratify exit 1 captured via if-subshell.
- SC6 anti-erosion section renumbered 14 -> 15; header comment updated.

Verification:
- Structure lint 81 -> 83/0/0 (contract-gate suite + ratify both green).
- Documented Step 4.5 command smoke-tested on a real draft
  (serier/silvija-seres-motsvar/utkast/04-utkast.md): 0 BLOCK / 2 WARN ->
  "Gate passert", exit 0.
- edition-state.template.json valid JSON; phases array = 17.

foldIns capture into the pipeline phases deferred to a later slice (scope A).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

config/edition-state.template.json

@@ -12,6 +12,7 @@
       "spine-prose — one paragraph per section against the gated skeleton, operator gate BEFORE full expansion (Step 3a)",
       "draft — full prose expansion against the gated spine; may span sessions (Step 3b)",
       "consistency-quality — threads, premise→conclusion arc, AI-slop removal, formatting dose (Step 4)",
+      "contract-gate — deterministic §B/§C1 rule-gate over the draft (scripts/contract-gate, rules.ts), bound 1:1 to the maskinrommet skrivekontrakt §E-manifest via ratify; mechanical violations die here before the AI sweeps (Step 4.5)",
       "factcheck-sweep — risk-sorted, guilty-until-disproven, verification log (Step 5)",
       "editorial-review — editor's craft gate: prose-craft (em-dash density, verbatim repetition, postulated numbers, contradictions, versal-tic) + narrative-architecture (concrete instantiation, theory-anchored hypotheses, series-title symmetry, equal action per addressee, un-overloaded conclusion), ≤10 flags BLOCK/REWORK/NICE, operator-gated via SendUserFile BEFORE the persona sweep (Step 5.5)",
       "persona-sweep-prelock — reader jury, primary wins, convergence to clean YES (Step 6)",