Improve livepeer_value_redeemed metric implementation

[rickstaa]

Improved Bug Report

Describe the Bug

The current implementation of the ValueRedeemed metric in the go-livepeer codebase exhibits behaviour where the metric is exposed only upon invoking the redeem winning ticket method (see these lines of code). The issue arises from the fact that the metric counter is not published when the go-livepeer client is restarted, as observed in the redeemed value panel of my orchestrator dashboard.

To Reproduce

1. Start the go-livepeer binary with the -monitor flag.
2. Visit http://localhost:7936/metrics and note the absence of the livepeer_value_redeemed metric.
3. Check the redeemed value panel in my orchestrator dashboard, confirming the metric is published only when a ticket is redeemed.

Expected Behavior

The livepeer_value_redeemed metric should function as a counter, initiating at 0. This adjustment ensures compatibility with Prometheus's increase method, enabling the metric to persist through binary restarts.

Screenshots

Desktop (Additional Information):

• OS: Ubuntu 22.04
• Version: a9a4b00

[leszko]

@rickstaa Thanks for raising the GH Issue!

I think it makes sense. Would you like to send a PR with the update?

[rickstaa]

@leszko This issue was fixed by @stronk-dev in #2916. As a result, it should not be present anymore on the main branch. I will test it out and close this issue 👍🏻.

[rickstaa]

I am closing this since the issue has been fixed.