fix(sourcemaps): limit debug ID registration to one stack frame

[amortemousque]

What and why?

Fixes #2537. Limit debug ID registration to the injected function's stack frame to avoid expensive source-position collection for large bundles. Registration remains synchronous and preserves the bundle URL used by the Browser SDK.

How?

Use the exact runtime snippet from #2542 (921e090): temporarily set Error.stackTraceLimit to 1 while constructing the error, then restore the original value in finally before reading .stack. No descriptor checks or additional fallback logic. The outer catch keeps application execution running if capture fails; a failing strict-mode assignment can skip registration.

Keep only two focused runtime tests: one-frame bundle registration with restoration before formatting, and restoration when error construction throws.

Validation: yarn build, yarn lint (0 errors; existing warnings), and all 118 sourcemap tests pass.

Review checklist

• Feature or bugfix MUST have appropriate tests (unit, integration)

Related build-plugins PR: DataDog/build-plugins#553

[datadog-datadog-prod-us1-2]

✅ All CI checks and tests passed.

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

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