Until now federation.sync-state only fired on (a) user clicking Sync
in the UI or (b) server-name push. That meant own_fips_npub,
last_transport, peer state updates — all the things v1.5 added for
auto-upgrade from Tor to FIPS — didn't propagate until the user
poked the button.
Fix: spawn a background task in server.rs that runs
federation::sync_with_peer for every Trusted peer every 30 minutes.
First run is 60s after boot (let onboarding settle) and peers are
staggered 5s apart to not hammer Tor's SOCKS proxy with concurrent
connects.
The sync path already prefers FIPS (via PeerRequest), so once peers
have learned each other's fips_npub (now automatic thanks to the
own_fips_npub broadcast in state snapshots), subsequent periodic
syncs route over FIPS — transport badge cycles from 'tor' to 'fips'
on its own without user action.
Covers task #30.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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