Fix: model reidentify losing path and failing on IP Adapters

[Pfannkuchensack]

Summary

The reidentify endpoint overwrote the model's relative path with an absolute path from the prober, and unconditionally accessed trigger_phrases which doesn't exist on all config types (e.g. IP Adapters), causing an AttributeError.

Related Issues / Discussions

Fixes #8940

QA Instructions

1. Install an IP Adapter model (e.g. Standard Reference ViT-H) via Model Manager
2. Reidentify the model
3. Verify it no longer throws an AttributeError on trigger_phrases
4. Verify the model path remains relative (not absolute)

Merge Plan

No special merge considerations.

Checklist

• The PR has a short but descriptive title, suitable for a changelog
• Tests added / updated (if applicable)
• ❗Changes to a redux slice have a corresponding migration
• Documentation added / updated (if applicable)
• Updated What's New copy (if doing a release after this PR)

[joshistoast]

Thanks for solving this so quick!

[lstein]

Works as advertised.