feat(infra): CD бота на сервер Vobot — Gitea Actions + deploy.sh

- infra/deploy/deploy.sh <dev|prod> [ref]: git archive → scp → remote.sh на сервере;
  руками и из CI, хост — DEPLOY_HOST (любой Docker-хост); каждый шаг с ретраями
- remote.sh: атомарная замена app/ (app.old для отката), compose -p tgit-<env> up --build,
  ожидание healthy, REVISION, подсказка отката при неудаче; безопасно перезапускать
- окружение без /srv/tgit/<env>/.env пропускается (prod — когда будет свой токен)
- .gitea/workflows/deploy.yml: push в dev/main → deploy; guard «актуален ли пуш», ключ через env

Refs #12

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

infra/deploy/remote.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+# Runs on the server: unpack release-<sha>.tgz, swap app/ atomically, compose up, wait for healthy.
+#   bash /srv/tgit/<env>/remote.sh <env> <sha>        (uploaded by deploy.sh; safe to re-run)
+set -euo pipefail
+ENV=$1
+SHA=$2
+DIR=/srv/tgit/$ENV
+PROJECT=tgit-$ENV
+cd "$DIR"
+
+if [ -f "release-$SHA.tgz" ]; then
+  rm -rf app.new && mkdir app.new && tar -xzf "release-$SHA.tgz" -C app.new && rm -f "release-$SHA.tgz"
+  cp .env app.new/.env
+  rm -rf app.old
+  [ -d app ] && mv app app.old
+  mv app.new app
+fi
+
+cd app
+docker compose -p "$PROJECT" up -d --build --remove-orphans </dev/null
+
+status=""
+for _ in $(seq 1 40); do
+  status=$(docker inspect -f '{{.State.Health.Status}}' "$PROJECT-bot-1" 2>/dev/null || true)
+  [ "$status" = healthy ] && break
+  sleep 3
+done
+if [ "$status" != healthy ]; then
+  echo "bot is '$status' after 2 min — last logs:" >&2
+  docker logs --tail 50 "$PROJECT-bot-1" >&2 || true
+  echo "rollback: cd $DIR && rm -rf app && mv app.old app && cd app && docker compose -p $PROJECT up -d --build" >&2
+  exit 1
+fi
+echo "$SHA" > ../REVISION
+docker image prune -f >/dev/null
+echo "bot healthy @ $SHA ($ENV)"