Tracking Issue - Refactor INX Writer

[grtlr]

The goal of this refactor is to make Chronicle easier to maintain by significantly reducing the amount of code. By refactoring our INX stream handling, we should also be able to improve the write speed of Chronicle because we would be able to get rid of many unnecessary memory allocations. It would also increase robustness for large data.

Steps

• Turn stardust_ledger_updates into an on-demand materialized view #686
• Remove the actor system #688
• Remove LedgerUpdateStream #702
• Remove LedgerOutput and LedgerSpent types #687
• Remove the ChunksExt iterator and use itertools::Chunks #689
• Use INX listen_to_treasury_updates instead of blocks.rs #597

Unresolved Questions

It would be interesting to quantify the performance improvement that are achieved by this refactor.

Implementation history

A basic setup for tasks that support graceful shutdown can be found here: https://github.com/grtlr/nort

[grtlr]

Apart from #597 (which is currently blocked) this has been done.