feat: add configurable parameters for Stable Diffusion Structured tool

[aleibovici]

Pull Request Template

Summary

This commit message reflects the changes made to the StableDiffusionAPI class, where new configurable parameters (cfg_scale, steps, width, and height) have been added and are now being used in the image generation payload. These parameters can be set through environment variables, providing more flexibility in configuring the Stable Diffusion image generation process.

Benefits

1. Increased Flexibility: Users can now easily adjust key parameters of the Stable Diffusion model without modifying the code.
2. Improved Customization: The ability to set cfg_scale, steps, width, and height allows for fine-tuning of the image generation process to suit specific needs.
3. Better Development and Testing: Developers can quickly experiment with different parameter values by changing the .env file.

Change Type

• New feature (non-breaking change which adds functionality)

• This change requires a documentation update

• Added new environment variables for Stable Diffusion parameters in the .env file

• Updated the StableDiffusionAPI class to use these configurable parameters

• Implemented fallback values for each parameter if not set in the environment

Usage

To use the new configurable parameters, add the following lines to your .env file and adjust the values as needed:

Testing

SD_CFG_SCALE=7.5
SD_STEPS=50
SD_WIDTH=512
SD_HEIGHT=512

If any of these variables are not set, the system will use default values as defined in the StableDiffusionAPI class.

Testing

Please test the image generation process with various parameter combinations to ensure the changes work as expected across different scenarios.

Checklist

Please delete any irrelevant options.

• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• My changes do not introduce new warnings
• Local unit tests pass with my changes