fix(model): pass $recursive parameter to parent in objectToRawArray

[gr8man]

Fix a bug in Model::objectToRawArray() where the $recursive parameter was accepted but never forwarded to BaseModel::objectToRawArray(). The method called parent::objectToRawArray($object, $onlyChanged) without the third argument, causing nested Entity objects to always be returned as objects instead of recursively converting them to arrays when $recursive=true.

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value (without duplication)
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[mergeable]

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