fix(dashboard): Allow failure_rate in span aggregate functions

[sentry]

This PR addresses CLI-1CZ by adding failure_rate to the SPAN_AGGREGATE_FUNCTIONS array in src/types/dashboard.ts.

Previously, attempting to use failure_rate as an aggregate function for span-based dashboard widgets would result in a ValidationError: Unknown aggregate function "failure_rate" because it was not included in the allowlist for span aggregates.

Adding failure_rate to SPAN_AGGREGATE_FUNCTIONS resolves this validation error, enabling its correct usage in span queries.

Fixes CLI-1CZ

_{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 5497 uncovered lines.
❌ Project coverage is 81.74%. Comparing base (base) to head (head).

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
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- Coverage    81.75%    81.74%    -0.01%
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  Files          428       428         —
  Lines        30106     30106         —
  Branches     19593     19593         —
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+ Hits         24611     24609        -2
- Misses        5495      5497        +2
- Partials      2054      2055        +1

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

Duplicate failure_rate in discover list

Low Severity

Adding failure_rate to SPAN_AGGREGATE_FUNCTIONS also pulls it into DISCOVER_AGGREGATE_FUNCTIONS via the spread, while the discover-only list still keeps an explicit failure_rate entry. That leaves a duplicate in the combined allowlist and surfaces failure_rate twice in discover/error-events validation error messages.

Additional Locations (1)

• src/types/dashboard.ts#L272-L273

 

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[sentry]

Bug: The DISCOVER_AGGREGATE_FUNCTIONS array contains a duplicate "failure_rate" entry, which causes it to appear twice in error messages for invalid aggregate functions.
_{Severity: LOW}

Suggested Fix

Remove the explicit "failure_rate" entry from the DISCOVER_AGGREGATE_FUNCTIONS array definition around line 273 in src/types/dashboard.ts, as it is already included via the spread of SPAN_AGGREGATE_FUNCTIONS.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location: src/types/dashboard.ts#L255

Potential issue: The `DISCOVER_AGGREGATE_FUNCTIONS` array contains a duplicate entry for
`"failure_rate"`. This happens because `SPAN_AGGREGATE_FUNCTIONS`, which now includes
`"failure_rate"`, is spread into the array, and then `"failure_rate"` is explicitly
added again. While this does not cause functional issues or validation failures due to
how `Array.includes()` and Zod's `enum` work, it does result in a minor cosmetic issue.
If a user provides an invalid aggregate function, the resulting error message will list
`"failure_rate"` twice.

_{Did we get this right? 👍 / 👎 to inform future reviews.}