Merge staging into prod

[nrichers]

Pull Request Description

What and why?

This PR releases some Databricks docs updates to prod.

How to test

What needs special review?

Dependencies, breaking changes, and deployment notes

Release notes

Checklist

• What and why
• Screenshots or videos (Frontend)
• How to test
• What needs special review
• Dependencies, breaking changes, and deployment notes
• Labels applied
• PR linked to Shortcut
• Unit tests added (Backend)
• Tested locally
• Documentation updated (if required)
• Environment variable additions/changes documented (if required)

[github-actions]

PR Summary

This pull request enhances the Databricks integration documentation by making the following functional changes:

1. In the integrations examples file, the URL for the Databricks quickstart has been updated to point to a GitHub-hosted notebook. The textual content was also slightly reorganized for better readability.

2. In the managing integrations document, the grid column setting was modified from 3 to 2 to adjust the layout of the integrations listing.

3. A comprehensive quickstart notebook (validmind_databricks_quickstart.ipynb) has been added. This interactive notebook guides users through installing the ValidMind Library, verifying the installation, initializing the library with API credentials (using Databricks widgets or hardcoded placeholders), and then loading data from a Unity Catalog table (or a synthetic fallback). The notebook further demonstrates splitting data, training a simple model, registering datasets and the model with ValidMind, assigning model predictions, and running both individual tests and a full test suite. This improvement makes it easier for users to integrate with Databricks and validate their setup end-to-end.

Test Suggestions

• Run the quickstart notebook in a Databricks environment to ensure all installation steps and initialization flows work as expected.
• Verify that the updated URL in the integrations examples correctly points to the new GitHub resource and that the linked resource is accessible.
• Check that the change in grid columns in managing-integrations.qmd renders as intended in the documentation site layout.
• Test the error handling in the notebook when API credentials are missing or when the synthetic fallback is activated.

[github-actions]

Validate docs site

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