Mutex in tx monitor

[GabrielMartinezRodriguez]

Linked Issues

• closes https://linear.app/happychain/issue/HAPPY-136/txmanager-avoid-overlapping-txmonitor-executions

Description

This PR implements a mutex in the TxMonitor class to prevent overlapping executions of multiple transactions. Additionally, if more than one process is waiting to acquire the mutex, only the last process will acquire it, and the previous ones will be discarded

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Checklist

Basics

• B1. I have applied the proper label & proper branch name (e.g. norswap/build-system-caching).
• B2. This PR is not so big that it should be split & addresses only one concern.
• B3. The PR targets the lowest branch it can (ideally master).

Reminder: PR review guidelines

Correctness

• C1. Builds and passes tests.
• C2. The code is properly parameterized & compatible with different environments (e.g. local,
  testnet, mainnet, standalone wallet, ...).
• C3. I have manually tested my changes & connected features.

This PR has been tested using the randomness service on localhost, interacting with the Anvil blockchain and simulating that a monitoring execution took longer than expected to verify that the mutex was working properly

• C4. I have performed a thorough self-review of my code after submitting the PR,
  and have updated the code & comments accordingly.

Architecture & Documentation

• D1. I made it easy to reason locally about the code, by (1) using proper abstraction boundaries,
  (2) commenting these boundaries correctly, (3) adding inline comments for context when needed.
• D2. All public-facing APIs & meaningful (non-local) internal APIs are properly documented in code
  comments.
• D3. If appropriate, the general architecture of the code is documented in a code comment or
  in a Markdown document.

[GabrielMartinezRodriguez]

• Add flush mechanism #289 : 2 dependent PRs (#297 , #298 )
• Allow run multiple txm simultaneously within the same service #285
• Added docs for txm #272
• Mutex in tx monitor #264 👈 (View in Graphite)
• Purge transactions #232
• Txm hooks #229
• Use kysely instead of mikro-orm #250
• master

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View logs

[linear]

HAPPY-136 txmanager: Avoid overlapping TxMonitor executions

cf. #182 (comment)

Maybe needed in some other blocks that listen on new blocks and do RPC calls?

[norswap]

We don't need this one anymore :)