Implement Documentation Status Badges

[stkossman]

To improve documentation navigability and clearly communicate the state of our guides, we need to implement Starlight's built-in badge system.

Tasks:

• Define standard badge usage in our CONTRIBUTING.md guidelines so all developers use the same terminology:
  • New (variant: success)
  • Updated (variant: note)
  • WIP (variant: caution)
  • Deprecated (variant: danger)
  • Advanced (variant: default)
• Apply the New badge via frontmatter (sidebar.badge) to recently added pages (e.g., Database Schema, System Overview).
• Utilize the inline <Badge /> component for specific advanced sections within articles (e.g., Redis Seat Locking).

Technical Example (Frontmatter):

sidebar:
  badge:
    text: New
    variant: success