GeezerVison

The Angular compiler unconditionally adds a debug name transform for signals which generates a conditional on ngDevMode (e.g., ngDevMode ? { debugName: "xyz" } : []). During testing, ngDevMode is true, so the true branch executes but the false branch is never executed. Consequently, coverage tools report the false branch as an untested line/branch, preventing 100% test coverage.

This commit adds a synthetic /* istanbul ignore next */ comment to the generated false branch so that Istanbul ignores it. We only include the istanbul comment (instead of additionally including c8) to focus on the established standard for Angular CLI/Karma coverage while maintaining compatibility with modern Vitest setups, since @vitest/coverage-v8 now natively respects the fallback istanbul comment.

In conversation with Gemini, I believe instanbul ignore next should be sufficient for Karma and Vitest with Istanbul or v8 code coverage, but I'm hoping either @alan-agius4 or @clydin can confirm whether or our code coverage story would benefit from a separate c8 ignore next directive.

Fixes #64583

/cc @hawkgs @AleksanderBodurri