* use non-deprecated engine API method for Hive JWT tests * also remove reference in nrpc
* inital external sync structure * add to makefile * feat: external syncer with healing process * fix: suggestions * network mapping * minor changes * forward sync * jwt auth * nrpc structure * nrpc engine-api loader * fix: suggestions * fix: suggestions * remove sync_db * fix: edge cases and forks * fix: rebase changes * revert nimbus config changes