Both providers checked the wrong SettingsStore flag in isEnabled(), so
their toggles in Settings > Connection and sync > Domain lookups had no
effect:
- YatAddressProvider read lookupsWellKnown instead of lookupsYatService,
so the 'Yat' toggle did nothing and '.wellknown' unexpectedly gated it.
- ZcashMeAddressProvider read lookupsZcashNames instead of
lookupsZcashAddress, so the 'Zcash.me' toggle did nothing and it was
gated by the 'Zcash Names' toggle.
Each provider now reads the flag its own toggle writes, matching the
mapping in ConnectionSyncViewModel.lookupValue/setLookupValue.
