test: log dynamic EvoNode helper exceptions

[thepastaclaw]

Summary

• include helper arguments and structured RPC error payloads when dynamic masternode/EvoNode setup is rejected
• log unexpected dynamic helper exceptions with tracebacks before the existing accepted/rejected assertion fails
• keep expected rejection cases as info-level logs

Context

This does not claim to fix the underlying feature_dip3_v19.py flake from #6702, but it should make the next failure more actionable instead of reducing it to dynamically_prepare_masternode failed or protx_evo rejected.

Testing

• python3 -m py_compile test/functional/test_framework/test_framework.py
• git diff --check
• pre-PR code review: ship

[thepastaclaw]

Review Gate

Commit: 1bbfbf99

• ✅ Debounce: 16244m ago (need 30m)

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[github-actions]

✅ No Merge Conflicts Detected

This PR currently has no conflicts with other open PRs.

[thepastaclaw]

Closing during authored-PR cleanup. This helper diagnostic draft was useful for investigation, but it should not remain open as a review item right now.