Discoveries page miner cards still show pull-request stats

[HadesHappy]

Description

On the Discoveries page (/discoveries), each miner card currently shows two rows of numbers:

1. A row of pull-request activity — Merged / Open / Closed PRs plus a Score.
2. A row of issue activity — Solved / Open / Closed issues plus a total.

The Discoveries page is scoped to issue discovery, so the pull-request row is out of place and makes the card noisier than it needs to be.

There's also a small visual inconsistency in the small circular indicator at the top of every card:

• The percentage drawn inside the circle is the miner's issue credibility.
• The colored segments of the circle are drawn from the miner's pull request merged / open / closed counts.

So the number and the chart are describing two different things on the same widget.

Steps to Reproduce

1. Go to https://gittensor.io/discoveries
2. Look at any miner card
3. Notice two rows of stats — one for PRs, one for Issues
4. Hover the circular indicator — the % in the middle (issue credibility) doesn't match what the donut segments represent (PR states)

Expected

On the Discoveries page, each miner card should show only issue-discovery stats:

• Solved / Open / Closed issues
• Discovery score on the right

The small circular indicator should also use issue counts (solved / open / closed) so it agrees with the percentage shown in the middle.

The OSS Contributions page cards should stay exactly as they are today (showing pull-request stats).

Actual

Discoveries cards show both pull-request and issue stat rows, and the donut segments on the card still use pull-request data.

Screenshot

(attach the screenshot of the Discoveries page showing the two stacked rows)

Environment

• Browser: any
• URL: https://gittensor.io/discoveries

Screenshot Evidence