fix(core): Replace misleading "No path back to node" error with helpful execution message #17759
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… improve error handling in workflow-data-proxy
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cubic analysis
No issues found across 2 files. Review in cubic
…ove path validation
…ging for node previews
…ck-to-node-bug-when-manual-prod-executions-clearly
…kflows with multiple AI connections
ivov
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Change looks clean, tested runners working.
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E2E Tests: n8n tests passed after 5m 39.7s Run Details
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…ul execution message (#17759)
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…ul execution message (#17759)
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…ul execution message (#17759)
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Summary
Replaces misleading "No path back to node" error with helpful "Execute node for preview" message when referencing nodes without execution data.
Also fixes AI/tool node path detection regression and adds cycle detection for node traversal.
Related Linear tickets, Github issues, and Community forum posts
PAY-3168
Review / Merge checklist
release/backport(if the PR is an urgent fix that needs to be backported)