Add API status page

[anth-volk]

Add a developer tools section with an API status page that displays real-time uptime monitoring data from BetterStack.

Requirements

• Add "Developer tools" link to the site footer
• Create a /dev-tools landing page with card grid
• Create an /dev-tools/api-status page displaying:
  • Aggregate status banner (operational / degraded / down)
  • Per-service 90-day uptime bar visualizations
  • Uptime percentages
• Vercel serverless function to proxy BetterStack Uptime API (authenticated)
• Per-day bar colors: >1hr outage = red, >0 but ≤1hr = yellow, no outage = green

[andrianvaleanu]

Building status pages from scratch is always more work than it looks, especially getting those 90-day bars to render right. If you want to skip the manual Vercel proxy and the UI work, you can use https://pulsetic.com/ to generate a status page that handles the uptime data and outages automatically.