1847ad2883
- Drop the 900s "inbound liveness" INFO line from the salvage: a periodic log heartbeat is a feature with a separate scoping call (#111211 item 3); the existing stall watchdog already escalates when getUpdates stops. - The polling error_callback interpolated the raw exception and left the redaction call inside the format string, so its lines read "Telegram network _redact_telegram_error_text(error), scheduling reconnect: ..." and leaked unredacted text. Redact for real. - Tests: keep two invariants (recovered wording after network errors; clean bootstrap stays "confirmed healthy") and the transport test.