Change Hardcoded Image Save Path to Support Parallel Processing

[codechrl]

Description:
Currently, the image_save_path is hardcoded as:

image_save_path = f"imgs/saved_image_demo.png"

This causes issues when handling multiple API requests simultaneously, as the file gets overwritten. To support parallel processing, I propose changing it to:

import uuid

def generate_uuid():
    return str(uuid.uuid4())

image_save_path = f"imgs/{generate_uuid()}.png"

Proposed Solution:
Modify the save path to use generate_uuid() to ensure unique filenames for each request.
This will prevent file conflicts and allow the API to process multiple requests concurrently.

Impact:
Improves API reliability in multi-request scenarios.
Prevents data loss due to file overwrites.

Let me know if any additional considerations are needed.