feat(core): Use node IDs instead of names for data mocking during test runs (no-changelog)

[burivuhster]

Summary

As node names in workflows can be changed over time, relying on node names for data mocking in workflow evaluation is very fragile.
This PR addresses this issue by storing IDs of the nodes to be mocked. Test runner now resolves node data in past executions using IDs instead of names.

Related Linear tickets, Github issues, and Community forum posts

• https://linear.app/n8n/issue/AI-500/use-node-ids-instead-of-names-for-pinning-in-test-runner

Review / Merge checklist

• PR title and summary are descriptive. (conventions)
• Docs updated or follow-up ticket created.
• Tests included.
• PR Labeled with release/backport (if the PR is an urgent fix that needs to be backported)

[codecov]

Codecov Report

Attention: Patch coverage is 90.47619% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...s/cli/src/evaluation/test-definition.service.ee.ts	71.42%	1 Missing and 1 partial ⚠️

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