chore(release): v2.0.6 "Composer" — rebuild + version bump + CHANGELOG

Bumps vestige-core + vestige-mcp + @vestige/dashboard +
vestige-mcp-server + @vestige/init from 2.0.5 → 2.0.6, regenerates the
Cargo.lock, rebuilds the dashboard with the new events.ts handlers +
intentions page fix baked in, and writes the v2.0.6 "Composer" entry
to CHANGELOG.md.

Release contents:
- fix(dashboard): intentions page priority + trigger rendering
  (commit 9df63de)
- feat(dashboard): wire 6 graph event handlers — suppress, unsuppress,
  Rac1 cascade, Connected, ConsolidationStarted, ImportanceScored
  (commit f085cfd)
- feat(mcp): opt-in VESTIGE_SYSTEM_PROMPT_MODE=full composition mandate
  (commit 7d7a7c2)
- docs(readme): v2.0.6 header + Intel Mac / Windows build-from-source
  honesty (commit ede0a02)

Pre-push gates green: cargo test --workspace --release, cargo clippy
--all-targets -D warnings, svelte-check (580 files 0 errors), vitest
(171/171). No regressions of merged PRs #18/20/22/24/26/28/29/30/32/33.

packages/vestige-init/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vestige/init",
-  "version": "2.0.5",
+  "version": "2.0.6",
   "description": "Give your AI a brain in 10 seconds — zero-config Vestige v2.0 installer with 3D dashboard",
   "bin": {
     "vestige-init": "bin/init.js"