Leaderboard tip is incorrect

See node tank-0012-aqua. According to fork-observer it is actually in sync with the miner's chain tip (`1457`). The `node-data` also supports this, showing the correct tip as the "active" chain.

However, the first chaintip in the array is an inactive fork at a much lower height (`806`), which is interesting, but it is not accurate to report that node as being "stuck" at that height.

I suspect the issue is this line:

https://github.com/bitcoin-dev-project/warnet-web/blob/2933a9e0f1bb8aa3a1273805a56cabff845e419f/src/components/node-group-cards.tsx#L40

Once this is patched, we'll need to apply to the `plugin` branch and deploy a new image for warnet

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Start at src/components/node-group-cards.tsx line 40 and compare the leaderboard tip selection with the fork-observer and node-data described for node tank-0012-aqua. The leaderboard should report the active chain tip at height 1457 rather than the inactive fork at height 806. After the fix, apply it to the plugin branch and deploy a new Warnet image.

Written by the indexing model from the issue text.