[Epic] WatchTower run with ZERO errors

[anxolin]

WatchTower has many errors that are thrown to our alert/log system.

These errors are most of the time false positives of cases we want to handle better.

Handle special cases

This epic will point to some initiatives that would handle these cases.

• Handle Specific TWAP logic:
  • Handle Specific smart order validations (prep for TWAP handling): Validate orders using custom handlers composable-cow#56
  • So TWAP orders that will never be created are not re-checked in each block
    • Order is Expired (we don't need to keep checking, this order will never be created)
  • Reduce the checking frequency for TWAP
    • Non need to check on every block, we know the start time for each chunk
• perf: heuristically reject bad contracts emitting events #6
• Handle Conditional Order cancellations (or missing auth): feature: Handle cancellations: Reduce errors and logs composable-cow#52
• Do not delete orders that fails for UNKNOWN reason (so its re-attempted later): Improve error handling on getTradeableOrderWithSignature CALL simulation composable-cow#46
• Handle DuplicatedOrder on the Orderbook API: It should not be an errors, since it just mean that someone else already published it Improve logs and dont fail if it is a duplicated order composable-cow#40

Improve Logging / Monitoring

Also, as part of this effort on improving logging end monitoring:

• Allow to debug locally with Production State: feat: allow to define storage to debug tenderly actions composable-cow#54
• Create a DEV environment to be able to re-iterate the watch-tower: Deploy to dev and prod scripts composable-cow#45
• Add sentry, to overcome shortcomings of Tenderly logs and improve our observability/debug experience: Add sentry composable-cow#43
• Allow to re-process old blocks, to re-create a failure indexing an order locally Allow to re-process old blocks from local run composable-cow#41
• Do not fail in intermediate errors processing events, but fail if there was at least one error so Tenderly can show the FAILED STATUS: Do not fail on intermediate errors, but fail at the end if there was … composable-cow#36
• Handle errors writing in Tenderly Storage: fix: fix async issues composable-cow#53

Other MISC

• Add CLA: see https://github.com/cowprotocol/cla

[mfw78]

I've removed merkle support from this list as it's being tracked by the epic cowprotocol/pm#9. Subsequently, closing the issue.