Add filters for signals

[VaibhavPage]

Is your feature request related to a problem? Please describe.
We need to add a filtering capability so that a user can apply the filter the signal payload.

Describe the solution you'd like
JQ Filter looks like a good candidate for this.
https://stedolan.github.io/jq/manual/
https://github.com/savaki/jq

[vicaire]

Will this support filtering events from GCS/S3 based on the name of the file that was created in GCS/S3?

[magaldima]

Yes, this feature should be generic enough to support filtering by json fields.. given that you can marshal the content/payload of an event, you should be able to filter it.