feat: enable chainsync logging and auto-reconnect

[agaffney]

No description provided.

[agaffney]

$ ./cdnsd 
{"level":"info","timestamp":"2023-11-05T09:01:31-06:00","caller":"indexer/indexer.go:74","msg":"found previous chainsync cursor: 42719808, b9a694908457ea41b5831da2045f37efef0eb338a5d8c64ecc302faf12e89a9a"}
{"level":"info","timestamp":"2023-11-05T09:01:32-06:00","caller":"chainsync/chainsync.go:206","msg":"connected to node at preprod-node.world.dev.cardano.org:30000"}
{"level":"info","timestamp":"2023-11-05T09:01:33-06:00","caller":"cdnsd/main.go:88","msg":"starting DNS listener on :8053"}