fix: use resource find record on search instead model direct find

[Paul-Bob]

Description

Fixes #1809

When searching on a has many association table, the fetch_parent method was directly using ParentModel.find id strategy instead ParentResource.find_record id

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

Manual review steps

1. Step 1
2. Step 2

Manual reviewer: please leave a comment with output from the test if that's the case.

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This PR has been merged into main. The functionality will be available in the next release.

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