feat: Docker audit + Telegram bot service + send UI

Docker:
- Harden docker-compose.yml: parameterized DB creds, required AUTH_SECRET,
  health checks, resource limits, network isolation, removed exposed DB port
- Add profiles (telegram/bot/full) so base 'docker compose up' needs only AUTH_SECRET
- Fix docker-entrypoint.sh: AUTH_SECRET startup guard
- Fix Dockerfile: copy prisma.config.ts + dotenv into production image
- Update .env.example with all new variables
- Update .dockerignore

Telegram Bot Service (bot/):
- TDLib-based bot using bot token auth (not HTTP Bot API)
- Commands: /search, /latest, /package, /link, /unlink, /subscribe, /unsubscribe
- pg_notify listener for send requests (bot_send) and new packages (new_package)
- Subscription-based notifications when matching packages arrive
- Dockerfile with multi-stage build (bookworm-slim for glibc/TDLib)

API & Database:
- Prisma: TelegramLink, BotSendRequest, BotSubscription models + migration
- POST /api/telegram/bot/send - queue package delivery to linked TG account
- GET /api/telegram/bot/send/[id] - poll send request status
- Server actions: generateTelegramLinkCode, unlinkTelegram, getBotSendHistory
- Worker: emit pg_notify('new_package') after creating packages

Frontend:
- Settings: TelegramLinkCard for account linking via one-time code
- STL table + drawer: SendToTelegramButton with send dialog and status polling
- Telegram admin: Bot Sends tab with delivery history table
- Shared SendHistoryRow type

README: Updated with bot docs, profiles, config vars, project structure

.env.example

@@ -1,5 +1,8 @@
 # Database
 DATABASE_URL="postgresql://dragons:stash@localhost:5432/dragonsstash?schema=public"
+POSTGRES_USER="dragons"
+POSTGRES_PASSWORD="stash"
+POSTGRES_DB="dragonsstash"
 
 # Auth.js
 AUTH_SECRET="generate-with-openssl-rand-base64-32"
@@ -11,14 +14,23 @@ AUTH_GITHUB_SECRET=""
 
 # App
 NEXT_PUBLIC_APP_URL="http://localhost:3000"
+APP_PORT=3000
+
+# API key for external access to package/ingestion endpoints (optional)
+TELEGRAM_API_KEY=""
 
 # Telegram integration (get from https://my.telegram.org/apps)
 TELEGRAM_API_ID=""
 TELEGRAM_API_HASH=""
 
+# Telegram Bot (create via @BotFather on Telegram)
+BOT_TOKEN=""
+BOT_USERNAME=""  # e.g. "MyDragonsStashBot" — enables deep link in Settings
+
 # Worker (only needed when running worker container)
 WORKER_INTERVAL_MINUTES=60
 WORKER_TEMP_DIR="/tmp/zips"
 TDLIB_STATE_DIR="/data/tdlib"
 WORKER_MAX_ZIP_SIZE_MB=4096
+MULTIPART_TIMEOUT_HOURS=0
 LOG_LEVEL="info"