feat(telegram): live editable task tracker (Variant B+), replace 15-message spam

Replace the ~15 separate Telegram messages per task (agent start/finish, stage
transition, QG-pending, tech noise) with ONE live tracker message edited in
place (editMessageText) on every stage transition. Only attention-worthy events
are still sent as SEPARATE, notifying messages: approve-gate, deploy-fail,
agent-fail, task error.

- db.py: idempotent ALTERs — tasks.tracker_message_id, tasks.title,
  tasks.brd_review_started_at/ended_at, agent_runs.model. Helpers for
  tracker message_id + BRD-review clock.
- usage.py: short_model_name() (strip provider/claude- prefix); parse model
  from result-JSON modelUsage; record_usage persists model.
- notifications.py: render_task_tracker(task_id) (stateless render from
  agent_runs), update_task_tracker (sendMessage->store id->editMessageText with
  fallback to a new message, silent), edit_telegram(). Per-stage line
  in↓/out↑·cost·model, ⏸️ Ревью БРД (human time), 💰 totals, finish block
  (⏱️ wall/agents/yours, 🔗 PR · 📦). notify_* are now tracker-only/log-only
  except the four alerts.
- stage_engine.py: stamp brd_review_ended on analysis->architecture advance.
- webhooks/plane.py: persist task title on creation.
- tests/test_telegram_tracker.py: render, short_model_name, send/edit/fallback,
  separate-vs-silent alert behavior.

src/db.py

@@ -90,6 +90,25 @@ def init_db():
     # and the "X in" figure understates the true prompt size. Idempotent ALTER.
     _ensure_column(conn, "agent_runs", "cache_creation_tokens", "INTEGER")
     _ensure_column(conn, "agent_runs", "cost_usd", "REAL")
+    # Telegram live tracker (feat/telegram-live-tracker): persist the FULL model
+    # name (e.g. "tokenator/claude-opus-4-8") per agent_runs row so the tracker
+    # can render a short model tag per stage. Parsed from the run-log result JSON
+    # (modelUsage key) by the launcher monitor; NULL when unknown. Idempotent ALTER.
+    _ensure_column(conn, "agent_runs", "model", "TEXT")
+    # Telegram live tracker: one editable Telegram message per task. We store its
+    # message_id so each stage transition can editMessageText the same message
+    # instead of spamming a new one. Idempotent ALTER (safe on the live prod DB).
+    _ensure_column(conn, "tasks", "tracker_message_id", "INTEGER")
+    # Telegram live tracker: human-readable task title for the tracker header
+    # ("🛠️ ET-012 · <title>"). Populated from the Plane work-item name at task
+    # creation; falls back to the work_item_id when absent. Idempotent ALTER.
+    _ensure_column(conn, "tasks", "title", "TEXT")
+    # Telegram live tracker: "BRD review" is the only HUMAN gate time — the delta
+    # between "BRD ready / approve requested" and the analysis->architecture
+    # advance (human flipped Plane to Approved). Persisted on the task so the
+    # tracker can show "твоё время" without recomputing from activity history.
+    _ensure_column(conn, "tasks", "brd_review_started_at", "TEXT")
+    _ensure_column(conn, "tasks", "brd_review_ended_at", "TEXT")
     conn.commit()
     conn.close()
 
@@ -137,6 +156,71 @@ def update_task_stage(task_id: int, stage: str):
     conn.close()
 
 
+# ---------------------------------------------------------------------------
+# Telegram live tracker helpers (feat/telegram-live-tracker)
+# ---------------------------------------------------------------------------
+
+def get_tracker_message_id(task_id: int) -> int | None:
+    """Return the stored Telegram tracker message_id for a task, or None."""
+    conn = get_db()
+    try:
+        row = conn.execute(
+            "SELECT tracker_message_id FROM tasks WHERE id=?", (task_id,)
+        ).fetchone()
+    finally:
+        conn.close()
+    return row[0] if row and row[0] is not None else None
+
+
+def set_tracker_message_id(task_id: int, message_id: int) -> None:
+    """Persist the Telegram tracker message_id for a task (idempotent overwrite)."""
+    conn = get_db()
+    try:
+        conn.execute(
+            "UPDATE tasks SET tracker_message_id=? WHERE id=?",
+            (message_id, task_id),
+        )
+        conn.commit()
+    finally:
+        conn.close()
+
+
+def mark_brd_review_started(task_id: int) -> None:
+    """Stamp when BRD review (the human approve gate) started, if not already set.
+
+    Idempotent: only sets it the first time (a retried analyst run must not reset
+    the clock). The delta to brd_review_ended_at is the only "твоё время".
+    """
+    conn = get_db()
+    try:
+        conn.execute(
+            "UPDATE tasks SET brd_review_started_at=datetime('now') "
+            "WHERE id=? AND brd_review_started_at IS NULL",
+            (task_id,),
+        )
+        conn.commit()
+    finally:
+        conn.close()
+
+
+def mark_brd_review_ended(task_id: int) -> None:
+    """Stamp when BRD review ended (analysis->architecture advance / Approved).
+
+    Idempotent: only sets it the first time and only if a start exists.
+    """
+    conn = get_db()
+    try:
+        conn.execute(
+            "UPDATE tasks SET brd_review_ended_at=datetime('now') "
+            "WHERE id=? AND brd_review_started_at IS NOT NULL "
+            "AND brd_review_ended_at IS NULL",
+            (task_id,),
+        )
+        conn.commit()
+    finally:
+        conn.close()
+
+
 def get_next_work_item_id(repo: str, prefix: str = "ET") -> str:
     """Generate next work item ID (e.g., ET-003 / ORCH-001).