Phase 2: identity plumbing — group/member config, author: attribution

Config schema {owner,endpoint,key} -> {group, member, endpoint, key}:
- member (kebab-case slug, validated) is REQUIRED — who this machine
  writes as; group is the descriptive team name. CHORUS_GROUP/
  CHORUS_MEMBER env, config set --group/--member, doctor + config show
  both with sources, NOT-CONFIGURED (78) without a valid member.
- capture stamps author: <member> on every note (_build_note); bootstrap
  gains {{MEMBER}} substitution and stamps the seeded anchors; all 8
  scaffold templates + canonical frontmatter docs gain author:.
- New missing-author lint check: agent_written notes must carry author:
  (bootstrap marker exempt — plugin-owned).
- Lock owner is now <member>-<client>-<pid> (auto_owner); offline-queue
  records carry a member field for audit.
- build.py --bake-key bakes group/member/endpoint/key (--group/--member;
  member required + slug-validated) for per-member artifacts.
- Manifest -> 2.0.0-alpha.2; rebuilt chorus-memory.plugin.

Verified: 25/25 unit (+config/member checks), scaffold suite (+6 new
member/config assertions), routing-sync, 4 mock e2e (+capture-stamps-
author), run_eval metrics unchanged, +8 phase-2 smoke checks green.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

chorus-memory.plugin.src/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "chorus-memory",
-  "version": "2.0.0-alpha.1",
+  "version": "2.0.0-alpha.2",
   "description": "Group-based persistent memory via the shared CHORUS Obsidian vault over the Obsidian Local REST API. Cross-platform Python client: one-call capture/resolve/recall/link/triage over an entity index, hybrid BM25 + graph recall spanning entities + sessions/journal (recency/status-aware), a pre-write duplicate gate, complete-frontmatter capture, session hooks that self-fire load/reflect, offline write-ahead queue, lock-guarded concurrency, linter-enforced routing, and /chorus-* commands.",
   "author": {
     "name": "Jason Stedwell"