Prefix all Vizably-created repositories with `viz_`

[DevOlabode]

Summary

Repositories created by Vizably should automatically be prefixed with viz_.

For example:

• viz_scans
• viz_reports
• viz_accessibility-results

Problem

Currently, repositories created by Vizably do not have a consistent naming convention. This makes it easier to accidentally interact with user-owned repositories that were not created or intended for Vizably.

It is also not immediately obvious which repositories belong to Vizably.

Proposed Solution

When Vizably creates a repository, prepend viz_ to the repository name.

Benefits:

• Prevents accidentally reading from or writing to unrelated repositories.
• Makes Vizably-managed repositories immediately recognizable.
• Simplifies filtering, debugging, and future maintenance.
• Provides a clear namespace for repositories managed by the application.

Acceptance Criteria

• All newly created repositories use the viz_ prefix.
• Repository lookups and validations account for the new naming convention.
• Existing functionality continues to work with the updated repository names.
• Documentation and any relevant UI text are updated to reflect the naming convention.