Stage 17 #4: enrich the out-of-app your-turn push + add game-over

The Telegram 'your turn' notification now names the opponent and recaps their last
move (voiced as the opponent: «{name}: my move — «WORD». Score 120:95» for a scoring
play; a short 'swapped / passed, your turn' otherwise), and a new game-over
notification reports the result + final score when a game ends by any path (closing
play, all-pass, resign, timeout). Scores are recipient-first (the reader's score
leads), 2-4 players (120:95:80).

- schema: YourTurnEvent gains opponent_name/last_action/last_word/score_line
  (appended, backward-compatible); new GameOverEvent{result, score_line}. Go + UI
  bindings regenerated (flatc 23.5.26 + pnpm codegen).
- backend: notify.YourTurn enriched + notify.GameOver; emitMove resolves the mover's
  name and emits per-recipient (your_turn to the next mover, game_over to every seat),
  with recipient-first score lines built in one place.
- gateway: game_over joins the out-of-app whitelist (routing.go).
- connector: render builds the enriched your_turn + game_over text per language (en/ru).
- tests: notify round-trip (enriched + game_over), emit (enriched fields + game_over to
  all seats / per-seat result), connector render (en/ru), routing; integration replay
  (play → your_turn with real name; resign → game_over) green.
- docs: ARCHITECTURE push catalog + out-of-app set, FUNCTIONAL (+ _ru), PLAN tracker.

docs/FUNCTIONAL.md

@@ -41,9 +41,12 @@ sets their offered languages and is the bot their out-of-app notifications come
 joined a game and has been idle past the retention window is garbage-collected. While the app is open the client
 keeps a live stream and receives in-app updates in real time — the opponent's move,
 your turn, chat, nudges and a found match. When the app is **closed**, the chosen
-out-of-app events (your turn, nudge, a found match, an invitation or friend request)
-arrive as a **Telegram notification** instead — unless the player keeps notifications
-in the app only (a profile setting, **on by default**).
+out-of-app events (your turn, game over, nudge, a found match, an invitation or friend
+request) arrive as a **Telegram notification** instead — unless the player keeps
+notifications in the app only (a profile setting, **on by default**). The "your turn"
+notification names the opponent and recaps their last move — the word and the running score
+for a scoring play, or that they swapped or passed — and a finished game sends a "game over"
+notification with your result and the final score (scores read with yours first).
 
 ### Accounts, linking & merge *(Stage 1 / 11)*
 First platform contact auto-provisions a durable account. From the profile a player