Reduce geoBlock calls

[jvsena42]

Description

This PR reduces the checkGeoStatus calls. Not it is called only on first sync and when create a new invoice instead of every sync

Preview

n/a

QA Notes

Used this log to compare

    var calledTimes = 0
    var initialTime = System.currentTimeMillis()
    suspend fun shouldBlockLightning(): Boolean {
        calledTimes++
        val seconds = (System.currentTimeMillis() - initialTime) / 1000
        Logger.debug("shouldBlockLightning called $calledTimes on the last $seconds seconds")
        return checkGeoStatus() == true && !hasExternalNode()
    }

Before

2025-09-04 10:09:10.386 23448-23541 APP                     to.bitkit.dev                        D  DEBUG: shouldBlockLightning called 20 on the last 120 seconds [CoreService.kt:156]

After

2025-09-04 10:18:53.136 24711-24797 APP                     to.bitkit.dev                        D  DEBUG: shouldBlockLightning called 6 on the last 204 seconds [CoreService.kt:153]