SMS notifications when MDRS isn't sending data

Send an SMS to a list of support people if no data is coming in from MDRS.

We could also forward any messages texted in meshtastic if they have the person's name or a word like help.

Could use SMS with a paid service or an app like "pushover" to send right to ios notifications.

Start by tracing how EVALink determines that MDRS data is absent; no file or test is named in the issue. Clarify the support-recipient list, notification provider, trigger timing, and whether Meshtastic replies are in scope before implementation.

Written by the indexing model from the issue text.