Indexer panics if height not found on rpc

[gusin13]

{"level":"debug","time":"2024-11-12T09:24:02Z","message":"Fetched 25 events from block 31452"}
{"level":"debug","time":"2024-11-12T09:24:02Z","message":"Fetched 25 events from block 31453"}
{"level":"info","time":"2024-11-12T09:24:02Z","message":"Processed blocks up to height 31453"}
{"level":"debug","last_processed_height":31453,"latest_height":31454,"time":"2024-11-12T09:24:33Z","message":"Received new block height"}
{"level":"debug","time":"2024-11-12T09:24:33Z","message":"Fetched 25 events from block 31453"}
{"level":"fatal","time":"2024-11-12T09:24:33Z","message":"BBN block processor exited with error: error in json rpc client, with http response metadata: (Status: 200 OK, Protocol HTTP/1.1). RPC error -32603 - Internal error: could not find results for height #31454"}

indexer tries to fetch block at height but rpc errs (even after retries - a recent fix)

[gusin13]

its possible the retry logic not working as expected, double check the string parse logic

babylon-staking-indexer/internal/clients/bbnclient/bbnclient.go

Lines 121 to 131 in db9071b

	if strings.Contains(
	err.Err.Error(),
	"must be less than or equal to the current blockchain height",
	) {
	log.Debug().
	Str("block_height", fmt.Sprintf("%d", *blockHeight)).
	Str("backoff", backoff.String()).
	Msg("Block not yet available, retrying...")
	time.Sleep(backoff)
	backoff *= backoffFactor
	continue