feat(test-runner): log aria snapshot failures during error context capture

[pradapjackie]

Fixes #41536.

Summary

• Replace empty catch {} in ArtifactsRecorder._takePageSnapshot with debugLogger.log('api', ...)
• Include the caught error in the log message so snapshot failures are easier to diagnose
• Add a test that verifies the log appears when running with DEBUG=pw:api

Motivation

When a test fails, Playwright best-effort captures an AI aria snapshot for error-context.md. If that capture fails (timeout, page closing, etc.), the failure was previously swallowed silently. With DEBUG=pw:api, it is now observable.

No change to user-facing behavior for normal runs.

Test plan

• npm run eslint -- packages/playwright/src/index.ts tests/playwright-test/playwright.spec.ts
• npm run ttest -- tests/playwright-test/playwright.spec.ts -g "should log aria snapshot failures"

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