Support data sources in bundles

[eleftherias]

Summary

This allows Minder to create data sources from a bundle when a new user registers.

A part of this PR involves changing the parameter type in several functions from a db.Querier to a db.ExtendQuerier, making it more specific.

Change Type

Mark the type of change your PR introduces:

• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

Outline how the changes were tested, including steps to reproduce and any relevant configurations.
Attach screenshots if helpful.

Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[coveralls]

coverage: 56.751% (+0.1%) from 56.631%
when pulling cde2fc1 on eleftherias:data-source-marketplace
into 0a089be on mindersec:main.