Store wasOnDemandEnabled flag in providerConfiguration so the widget
can restore On Demand state on next start. Clear the flag when On
Demand is explicitly disabled in settings or when starting from the
main app.
Read package identifier and app group ID from Info.plist at runtime
via AppConfiguration. This enables SFM.System to use TeamID-prefixed
app group format required by macOS Sequoia, fixing the privacy prompt
when accessing app group data.
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