Preserve ignores for coverage

[tudddorrr]

No description provided.

[claude]

This PR looks good overall — the -- @preserve additions are complete and consistent across the codebase.

---

🔵 Minor

Inconsistent comment format in flush-metrics-queue-handler.ts:79

One comment places @preserve after descriptive text, diverging from the uniform -- @preserve suffix pattern used everywhere else:

// line 79 (this PR)
/* v8 ignore next -- called manually in tests @preserve */

// all other updated comments
/* v8 ignore next -- @preserve */

Functionally identical since esbuild only checks for the presence of @preserve, but for consistency it could either be:

/* v8 ignore next -- @preserve called manually in tests */
// or
/* v8 ignore next -- @preserve */

---

Unrelated change in package.json

The @types/koa__cors devDependency was reordered alphabetically. This is correct but unrelated to the PR's stated goal — worth a separate commit or PR for clarity, though not a blocker.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.99%. Comparing base (3f81307) to head (0dc0fb6).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #869      +/-   ##
===========================================
+ Coverage    96.67%   96.99%   +0.32%     
===========================================
  Files          388      388              
  Lines         6157     6132      -25     
  Branches       797      784      -13     
===========================================
- Hits          5952     5948       -4     
+ Misses         107       95      -12     
+ Partials        98       89       -9     

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