Add post-install Telegram customization — interval, label, alerts (#77)

- CLI: 	elegram interval <hours>, 	elegram label <name>, 	elegram alerts <on|off>
- TUI: Telegram Bot menu options [7] interval, [8] label (no wizard re-run needed)
- Show current values in TUI menu items and status display
- Bash completion updated with new subcommands
- README: document new commands + changelog entry

Closes #77

v1.0.7 — 20 new features: tags, templates, migrate, maintenance, bans…

…, encrypted backups, quota reset, auto-rotate, tune, verify, audit log, completion, speedtest & more

v1.0.6 — profiles, archive, search, info, port-check, mask-backend, b…

…ug fixes

Remove redundant load_secrets in export CLI path

Fix proxy auto-restarting after intentional stop (#49)

When stopping via mtproxymax stop or TUI, the container would restart
because Docker's --restart=unless-stopped policy and the Telegram bot's
auto-recovery both tried to bring it back.

Fix:
- Set Docker restart policy to 'no' before stopping
- Create /tmp/.mtproxymax_stopped flag on intentional stop
- Bot health check and auto_recover() skip recovery if flag exists
- Flag is cleared on next mtproxymax start/restart

v1.0.3 — Notes, quota enforcement, connection log, backup/restore, mu…

…lti-port

New features:
- Secret notes/description field (TUI [8], CLI `secret note`)
- Expiry warnings in secret list + Telegram alerts 3 days before
- Quota alerts at 80%/100% with auto-disable on quota exceeded
- `status --json` for monitoring/Grafana integration
- Connection activity log with auto-rotation (`connlog`)
- Backup/restore with metadata (`backup`, `restore`, `backups`)
- Multi-port instances with shared secrets (`instance add/remove/list`)

Improvements:
- Quota enforcement runs even when Telegram bot is disabled
- Secondary instances integrated into start/stop/restart and geo-blocking
- Config hot-reload propagates to all instances

v1.0.2: Persistent traffic counters, TUI performance, direction fixes

- Traffic stats persist across container restarts (#13)
- Cumulative traffic saved every 60s even without Telegram bot
- Pre-stop flush ensures no data loss on clean shutdown
- Batch stats loading: single metrics fetch replaces N*8 forks per user
- flock locking prevents race between daemon and CLI writes
- Fixed in/out direction mapping (from_client=in) across all functions
- Batch add/remove --no-restart flag support