add genesis hash check to ibp-geodns

[hitchhooker]

one or more members had wrong chainspec in paseo rpc endpoints since the paseo regenesis, causing outdated novasama metadata on paseo. our monitoring missed it. most likely github runner for novasama (generates qr codes from metadata) kept making wrong qr codes because it close geolocation to luckyfriday's node.

fix:

• add genesis hash to services.json for each network
• make geodns check genesis hash when querying nodes(query chain_getBlockHash)
• kick out nodes with wrong genesis from rotation

logs && script used for spotting:
https://gist.githubusercontent.com/hitchhooker/d18e6f0cb490c2447f01703ecbd7ad14/raw/4f083994f1ee250df66916c0618df60a034729dc/postmortem