Fix crash when delta in openai api handling could be empty in some ca…

[Szpadel]

…ses.

Fixes #641

this will ensure delta is an empty object in case of undefined and checks are no longer needed for each usage

Description

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Checklist:

• My code follows the patterns of this project
• 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

Additional context

Related Issues

Reviewers

---

Important

Fix crash in createMessage() in openai.ts by initializing delta as an empty object if undefined.

• Bug Fix:
  • In openai.ts, createMessage() now initializes delta as an empty object if undefined, preventing crashes when delta is empty.
  • Handles cases where delta.content or delta.reasoning_content might be accessed when delta is undefined.

^{This description was created by for 60cb550. It will automatically update as commits are pushed.}

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[mrubens]

Thank you for the quick fix!