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/ARCHITECTURE.md

@@ -485,7 +485,12 @@ in-app only, so the actor gets no out-of-app push for their own move), **chat-me
 friend-added, friend-declined, invitation or game-started; emitted on a friend-request,
 on answering one (accept → friend-added, decline → friend-declined — to the original
 requester, so a game screen watching that opponent re-derives its "add to friends" state,
-Stage 17), and on an invitation create or its game start). Event payloads are FlatBuffers-encoded by
+Stage 17), and on an invitation create or its game start). Stage 17 added **game-over** (emitted to every
+seat from the same game commit when a game finishes — any path: a closing play, all-pass,
+resign or timeout) and **enriched your-turn** so the out-of-app push reads in full: it now
+also carries the mover's display name, their last action and the main word of a scoring play,
+and a **recipient-first** running score line (e.g. `120:95:80`, the reader's score first).
+Event payloads are FlatBuffers-encoded by
 the backend and forwarded verbatim. A client that is not currently streaming falls
 back to the matchmaker's `Poll` for match-found and, for the lobby **notification
 badge** (incoming friend requests + open invitations), the client polls on lobby
@@ -499,7 +504,7 @@ back to the interface language — and the `notifications_in_app_only` flag) and
 button — only when the recipient has a Telegram identity and has not confined
 notifications to the app, so the two channels never duplicate. The connector routes by
 that language to the matching bot and renders the message in it. The out-of-app set is
-your-turn, nudge, match-found and the invitation / friend-request notify sub-kinds;
+your-turn, game-over, nudge, match-found and the invitation / friend-request notify sub-kinds;
 the connector renders the message and skips the rest. Operator broadcasts
 (`SendToUser` / `SendToGameChannel`, §10 admin) instead pick the bot by an
 **operator-chosen** language in the console, unrelated to the recipient's login. Session-revocation events and