[FEATURE REQUEST]: Add OpenAPI JSON generation to CI/CD release workflow

[Tekunalogy]

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• I have searched the project's issues and found no similar bug report.

Is your feature request related to a problem? Please describe.

We currently don't distribute the OpenAPI specification directly alongside our build artifacts.

Describe the solution you'd like

Automatically generate the openapi.json file during the release build process and attach it directly to the GitHub Release assets.

Describe alternatives you've considered

Generating it on-demand or Committing the JSON file directly.

Additional context

keep our docs site in sync with every release