Retry Gohbem Initialization on startup

[Fabio1988]

If the server can't reach the internet on startup (for any reason) gohbem is not initialized and therefore no pvp data can be calculated for raw data arriving later.

Golbat/decoder/main.go

Lines 189 to 192 in 7fbda8b

	if err := o.FetchPokemonData(); err != nil {
	log.Errorf("ohbem.FetchPokemonData: %s", err)
	return
	}

[lenisko]

Leaving last conversation: https://discord.com/channels/1083029607919386654/1088561574664491038/1314606126477742091

So what do we want to do? Either we exit Golbat with non-zero code or process without PvP and retry in a loop.