Fix #364
Fix #364

Use `plextContinuationGuid` to fix #364 like stock intel.

Using `torageHash.oldestTimestamp - 1` as the `maxTimestampMs` would _NOT_ be a correct solution, and that why: https://github.com/IITC-CE/ingress-intel-total-conversion/issues/364#issuecomment-740100570

Co-authored-by: Alexander Danilov <46f1a0bd5592a2f9244ca321b129902a06b53e03@modos189.ru>
McBen/ingress-intel-total-conversion,McBen/ingress-intel-total-conversion,McBen/ingress-intel-total-conversion,sndirsch/ingress-intel-total-conversion,sndirsch/ingress-intel-total-conversion,McBen/ingress-intel-total-conversion,sndirsch/ingress-intel-total-conversion,McBen/ingress-intel-total-conversion,sndirsch/ingress-intel-total-conversion,sndirsch/ingress-intel-total-conversion