Bug in indexer due to Nearblocks incident

[Tguntenaar]

Due to the nearblocks.io API incident Devhub and infrastructure-committee portal is behind.

The temporary solution is to keep syncing every ten seconds and removing dependency on the nearblocks API.

Added code for a cronjob to scan for new rfp's and proposals based on two environment secrets:

PROPOSAL_SYNC_INTERVAL
RFP_SYNC_INTERVAL
If these secrets are not set it won't call the RPC.

Also added two endpoints for rfp and proposal to sync manually if an incident like this happens again, we can just quickly sync manually and than turn on the interval updates until any issues have been resolved.