docs(tracker): update CHANGELOG, CLAUDE.md, .env.example for ORCH-067

Закрывает P0/P1 ревью (attempt 2/3): документация = golden source.
- CHANGELOG.md: запись ORCH-067 в [Unreleased] (bump-дефолт, статус-строка
  карточки по модели ORCH-066, кликабельный номер задачи, новые флаги).
- CLAUDE.md: раздел «Нотификации / Telegram live-tracker» (ТЗ §5).
- .env.example: ORCH_TRACKER_MODE=bump (синхрон с новым дефолтом) +
  ORCH_TRACKER_LIVE_STATUS / _TTL_S / _TIMEOUT_S.

Refs: ORCH-067

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.env.example

@@ -12,11 +12,25 @@ ORCH_GITEA_WEBHOOK_SECRET=
 ORCH_CLAUDE_BIN=/usr/bin/claude
 ORCH_REPOS_DIR=/home/slin/repos
 ORCH_DB_PATH=/app/data/orchestrator.db
-# ORCH-042: live-tracker mode. edit (DEFAULT) -> the task card is edited in place
-# (editMessageText). bump -> on every update the old card is deleted and a fresh
-# one is sent silently to the BOTTOM of the chat (deleteMessage + sendMessage +
-# repoint). One card per task in both modes. Any value other than "bump" -> edit.
-ORCH_TRACKER_MODE=edit
+# ORCH-042/ORCH-067: live-tracker mode. bump (DEFAULT since ORCH-067) -> on every
+# update the old card is deleted and a fresh one is sent silently to the BOTTOM of
+# the chat (deleteMessage + sendMessage + repoint), so the current status is always
+# the last message in an active chat. edit -> the task card is edited in place
+# (editMessageText). One card per task in both modes. Any value other than "bump"
+# (incl. empty/garbage) -> edit.
+ORCH_TRACKER_MODE=bump
+# ORCH-067: best-effort live-overlay for the card status line. The offline core
+# (stage -> Plane status, In Review from the brd-clock) always works without network;
+# the overlay only fills in branches indistinguishable offline (Needs Input / Blocked /
+# Rejected / Cancelled / Deploying / Monitoring after Deploy) by reading the LIVE Plane
+# status with a short timeout + per-issue TTL cache. It NEVER blocks the pipeline and
+# NEVER raises.
+#   LIVE_STATUS         -> kill-switch (false -> offline core only).
+#   LIVE_STATUS_TTL_S   -> TTL (seconds) of the per-issue live-uuid cache (hot-path guard).
+#   LIVE_STATUS_TIMEOUT_S -> timeout (seconds) of a single live-GET on the render path.
+ORCH_TRACKER_LIVE_STATUS=true
+ORCH_TRACKER_LIVE_STATUS_TTL_S=60
+ORCH_TRACKER_LIVE_STATUS_TIMEOUT_S=3
 # ORCH-043: merge-gate (auto-rebase onto current origin/main + re-test + merge-lock)
 # on the deploy-staging -> deploy edge. Deterministic sub-gate (no LLM) that catches
 # the branch up to the CURRENT origin/main, re-tests it, and serialises merges so two