fix(dashboard): reject MRI queries with actionable tracemetrics guidance

[BYK]

Summary

• Detect MRI (Metric Resource Identifier) syntax in --query arguments and reject with a ValidationError that suggests the correct --dataset tracemetrics format
• Port of Sentry's canonical Python MRI parser regex from sentry/snuba/metrics/naming_layer/mri.py

Problem

MRI-style queries like avg(g:custom/node.runtime.mem.rss@byte) with --dataset metrics passed CLI validation (since "avg" is a valid function name) but produced widgets that render as "Internal Error" in the Sentry dashboard UI.

Solution

Added parseMri() and rejectMriQueries() to the aggregate validation pipeline in src/types/dashboard.ts. When MRI syntax is detected, the error message includes:

• The equivalent tracemetrics query format: avg(value,node.runtime.mem.rss,gauge,byte)
• A prompt to switch to --dataset tracemetrics if not already using it

Example error:

MRI query syntax is not supported for dashboard widgets: "avg(g:custom/node.runtime.mem.rss@byte)".

Use the tracemetrics query format instead:
  --query 'avg(value,node.runtime.mem.rss,gauge,byte)'
Use --dataset tracemetrics instead of --dataset metrics.

Tracemetrics format: fn(value,<metric_name>,<type>,<unit>)

Closes #539

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

---

New Features ✨

• (upgrade) Show changelog summary during CLI upgrade by BYK in #594

Bug Fixes 🐛

• (dashboard) Reject MRI queries with actionable tracemetrics guidance by BYK in #601

• (skill) Avoid unnecessary auth, reinforce auto-detection, fix field examples by BYK in #599

Internal Changes 🔧

• Regenerate skill files and command docs by github-actions[bot] in 664362ca

---

_{🤖 This preview updates automatically when you update the PR.}

[github-actions]

Codecov Results 📊

✅ 129 passed | Total: 129 | Pass Rate: 100% | Execution Time: 0ms

📊 Comparison with Base Branch

Metric	Change
Total Tests	—
Passed Tests	—
Failed Tests	—
Skipped Tests	—

✨ No test changes detected

All tests are passing successfully.

✅ Patch coverage is 95.74%. Project has 1307 uncovered lines.
❌ Project coverage is 95.62%. Comparing base (base) to head (head).

Files with missing lines (1)

File	Patch %	Lines
src/types/dashboard.ts	95.74%	⚠️ 2 Missing

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
- Coverage    95.63%    95.62%    -0.01%
==========================================
  Files          203       203         —
  Lines        29799     29846       +47
  Branches         0         0         —
==========================================
+ Hits         28496     28539       +43
- Misses        1303      1307        +4
- Partials         0         0         —

---

Generated by Codecov Action