docs: reflect V1-0 landed + V1 completion track active + resume map

- current-state.md: header bumped to 2026-04-22, live_sha 2712c5d,
  547 tests. New "V1-0 landed" section covers what merged, what the
  prod backfill did, and where the next phase stands.

- master-plan-status.md: new "Active - Engineering V1 Completion
  Track (started 2026-04-22)" section between Now and Next.
  Contains the 7-phase table with V1-0 marked done, V1-A gated,
  V1-B..V1-F pending. V1 removed from the "Next" section since it
  is now Active.

- DEV-LEDGER.md Orientation: two new pointers — active_track points
  to the completion plan + resume map; open_branches points to the
  R14 branch still awaiting Codex review.

- docs/plans/v1-resume-state.md (new): single-page "you are here"
  for any future session. Covers state of play, start-gates for
  V1-A, pre-flight checklist, phase map, parallel-safe work, do-nots,
  open findings, agreement protocol history, reference index.
  Designed to be cold-readable — no prior session context required.

No code changes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

DEV-LEDGER.md

@@ -23,6 +23,8 @@
 - **capture_clients**: claude-code (Stop hook + cwd project inference), openclaw (before_agent_start + llm_output plugin, verified live)
 - **wiki**: http://dalidou:8100/wiki (browse), /wiki/projects/{id}, /wiki/entities/{id}, /wiki/search
 - **dashboard**: http://dalidou:8100/admin/dashboard (now shows pipeline health, interaction totals by client, all registered projects)
+- **active_track**: Engineering V1 Completion (started 2026-04-22). V1-0 landed (`2712c5d`), V1-A gated on soak (~2026-04-26) + density (100+ active memories, currently 84). Plan: `docs/plans/engineering-v1-completion-plan.md`. Resume map: `docs/plans/v1-resume-state.md`.
+- **open_branches**: `claude/r14-promote-400` at `3888db9` — P2 route fix (ValueError → 400), pending Codex review
 
 ## Active Plan