Exception handler encountered while performing `socket.io.emit` does not exist.

[MichaelKim20]

Because there is no exception handler, block data cannot be saved and recovered.
In function Stoa.recoverBlock(...) and Stoa.task(...)

await this.emitBlock(block);
await this.emitBoaStats();

It would be nice to make the following exceptions so that the processing performed on the function can be completed.

try {
   await this.emitBlock(block);
   await this.emitBoaStats();
} catch (e) {
}

It would also be important to find and resolve the cause of errors occurring at socket.io.emit.