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/deploy.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+# Deploy a git ref of the bot to a server. Used by hand and by CD (.gitea/workflows/deploy.yml).
+#   infra/deploy/deploy.sh <dev|prod> [git-ref]      default ref: HEAD
+# Env: DEPLOY_HOST  (default tgit-deploy@72.56.247.166 — the vobot host; any Docker host works)
+#      DEPLOY_SSH_OPTS (extra ssh/scp options, e.g. -i key)
+# Server layout: /srv/tgit/<env>/{.env, app/, app.old/, REVISION}; secrets live only in /srv/tgit/<env>/.env.
+# The host drops some ssh connections — every remote step is retried, and each one is safe to repeat.
+set -euo pipefail
+ENV=${1:?usage: deploy.sh <dev|prod> [ref]}
+REF=${2:-HEAD}
+case "$ENV" in dev | prod) ;; *) echo "env must be dev or prod" >&2; exit 2 ;; esac
+HOST=${DEPLOY_HOST:-tgit-deploy@72.56.247.166}
+OPTS=${DEPLOY_SSH_OPTS:-}
+DIR=/srv/tgit/$ENV
+SHA=$(git rev-parse --short "$REF")
+TGZ=$(mktemp --suffix=.tgz)
+trap 'rm -f "$TGZ"' EXIT
+git archive --format=tar.gz -o "$TGZ" "$REF"
+
+retry() { local n=0; until "$@"; do n=$((n + 1)); [ $n -ge 5 ] && return 1; echo "retry $n: $1" >&2; sleep $((n * 5)); done; }
+
+# shellcheck disable=SC2086
+if ! retry ssh $OPTS "$HOST" "test -f $DIR/.env"; then
+  echo "::notice::$HOST:$DIR/.env not found — environment '$ENV' is not configured, skipping deploy"
+  exit 0
+fi
+
+echo "deploy $REF ($SHA) -> $HOST:$DIR"
+# shellcheck disable=SC2086
+retry scp -q $OPTS "$TGZ" "$HOST:$DIR/release-$SHA.tgz"
+# shellcheck disable=SC2086
+retry scp -q $OPTS infra/deploy/remote.sh "$HOST:$DIR/remote.sh"
+# shellcheck disable=SC2086
+retry ssh $OPTS "$HOST" "bash $DIR/remote.sh $ENV $SHA"