chore: refactor chat and text completion methods to custom remove str…

[VisargD]

…eaming response handling

Title:

Description:

• Removed redundant custom stream chunk handling and relying on the vendor OpenAI SDK response directly.

Motivation:
To avoid maintain dual stream handling logic

Related Issues:
#

[Copilot]

Pull Request Overview

This PR refactors streaming response handling for chat and text completion methods by delegating the streaming logic to the OpenAI client's native implementation instead of custom string parsing.

Key Changes:

• Removed custom streaming response parsing logic that manually handled SSE (Server-Sent Events) data formatting
• Delegated streaming to OpenAI client's native completions.create() and chat.completions.create() methods
• Fixed missing await keywords in async stream method calls

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
portkey_ai/api_resources/apis/complete.py	Removed custom streaming response handling for text completions and fixed async/await for stream_create call
portkey_ai/api_resources/apis/chat_complete.py	Removed custom streaming response handling for chat completions and fixed async/await for stream_create call

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.