feat(Event_Logs): How should we learn about encrypted logs?

[LHerskind]

We currently have no nice way of learning about the encrypted event logs. Consider how we could support filters or similar searching when only the incoming_tag and outgoing_tag is readable without decrypting anything.

As we will not be able to look for a specific contract, it might be very very hard to do a "small" search for logs as you cannot filter on any values if you have not already decrypted it.

One option might be to do similar to the note processor, and have a logs processor that is building a view of events that you can decrypt that is then easily searchable, but this might add a significant overhead in the amount of compute required until tags are properly supported if notes is expected to receive actual usage.

[sklppy88]

Marked as completed via #7232.

We can definitely optimize the current approach more, but it will probably require a bit more thinking about the problem.