fix(cli): Deduplicate metric suggestions in ResolutionError

[sentry]

The resolveMetricField function in the CLI, when a metric is not found, attempts to suggest similar metrics using fuzzyMatch. The candidateNames list, however, was populated directly from the metrics array returned by the API, which can contain duplicate entries for the same metric name (e.g., due to different tag combinations).

This led to fuzzyMatch returning the same metric name multiple times in the suggestions, resulting in confusing error messages like "Similar metrics: metric.name, metric.name, metric.name...".

This change wraps the metrics.map(m => m.name).filter(...) expression with [...new Set(...)] to ensure that candidateNames contains only unique metric names. This prevents duplicate suggestions in the ResolutionError message, improving clarity for the user.

Fixes CLI-1XK

_{Comment @sentry <feedback> on this PR to have Autofix iterate on the changes.}

[github-actions]

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[github-actions]

Codecov Results 📊

✅ Patch coverage is 100.00%. Project has 5493 uncovered lines.
✅ Project coverage is 81.75%. Comparing base (base) to head (head).

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
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+ Coverage    81.74%    81.75%    +0.01%
==========================================
  Files          428       428         —
  Lines        30106     30105        -1
  Branches     19593     19593         —
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+ Hits         24611     24612        +1
- Misses        5495      5493        -2
- Partials      2054      2054         —

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