[Reality Module] Add more monitoring

[asgeir-s]

The current implementation only adds monitoring for the ProposalQuestionCreated event.

We should probably add monitoring for other events, like:

• [ ] New answer submitted (example event: https://goerli.etherscan.io/tx/0x07c9f64268e239010c56c8807c1038e3b1f7217bfc4d7f032d79c745ef267580#eventlog).

~This requires us to get a callback when new questions are created for a Reality Module so that we can get the question ID to set up a new sentinel (new monitoring). If we are going to do this, we also have to save the user's API key and the secret for use later when setting up monitoring for specific questions.~

It looks like we can use Defender Autotasks for this: https://docs.openzeppelin.com/defender/autotasks

[asgeir-s]

Process:

• [ ] The Sentinel that triggers on the ProposalQuestionCreated event, must trigger an Autotask.
• [ ] The Autotask needs access to:
• The Reality.eth question ID from the ProposalQuestionCreated event that triggers the Sentinel that triggers the Autotask.
• The notification channels from the original monitoring setup request (from when the Sentinal was created).
• The oracle address from the original monitoring setup request (from when the Sentinal was created).
• [ ] The Autotask must set up a new Sentinel that monitors for the LogNewAnswer event from the Oracle, and filters based on the question ID.

Cleanup:

• [ ] When a question is no longer relevant (see related issue: https://github.com/gnosis/zodiac-module-reality/issues/74), remove the Sentinel created by the Autotask (for monitoring the question ID).