Update our override of Laravel's attributesToArray()

[mjauvin]

• Use base Model methods instead of re-implementing them ourselves.
• Add our before/after events.
• Handle model's $jsonable array since Laravel doesn't seem to handle this.
• Using base model addCastAttributesToArray() also adds casting types not supported before:
  • date:<format>
  • datetime:<format>

Note: in order for created_at/updated_at columns to be used in $casts, the model's $timestamps property needs to be false.

Summary by CodeRabbit

• Refactor

  • Consolidated internal attribute transformation logic into dedicated helper routines to improve maintainability and reliability.

• Tests

  • Added coverage verifying date and cast handling to ensure attribute serialization behaves as expected.

Note: No user-facing changes or public API updates in this release.

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