feat(voyage): S13 — RELEASE v5.5.0 (framing 2.2 badge + NW1–NW3 + W2/W3 roll-up)

The coordinated release held since S6. Bumps 5.1.1 → 5.5.0 across plugin.json,
package.json, package-lock.json, README badge, and CHANGELOG (operator-confirmed
version; matches the codebase-wide v5.4/v5.5 milestone labels). Additive — no
breaking change for existing consumers; new brief requirements gate only on
briefs that declare brief_version 2.2.

Lands:
- brief_version 2.2 framing enforcement (framing enum + memory-alignment dim +
  obligatory TL;DR), held since S6 — badge now bumped
- Handover 1 PUBLIC CONTRACT formalization (the unreleased "v5.4")
- W2: Opus 4.8 baseline + native effort: on 8 agents + resolver model-gate fix
- W3: exec-form hooks (CC-14) + disallowed-tools on trekexecute (CC-11)
- NW1 reviewer-output schema contract; NW2 --workflow opt-in (bake-off POSITIVE);
  NW3 synthesis-agent dormant (declined per measurement)

CC 2.1.130→181 dispositions (docs/cc-upgrade-2.1.181-decision-matrix.md §S13):
- CC-08: GH#36071 (hooks in headless) CLOSED AS NOT PLANNED, not fixed →
  in-prompt safety preamble retained
- CC-29/31: verified clean / aligned, no code change
- CC-07/12/13: DEFER confirmed (recorded, no code)
- CLAUDE.md root warning: ACCEPTED BY DESIGN (universal across marketplace,
  advisory only; repo/maintainer context, not shipped consumer context)

TDD: version-consistency + v5.5.0-entry tests added first (RED→GREEN).
Tests 695 → 697 (695 pass / 2 skip / 0 fail). `claude plugin validate` passes
(one accepted advisory warning).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LqBYc8Ltrk7LipyJmGxXiB

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "voyage",
-  "version": "5.1.1",
+  "version": "5.5.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "voyage",
-      "version": "5.1.1",
+      "version": "5.5.0",
       "license": "MIT",
       "engines": {
         "node": ">=18"