PR #50 merged: fix: dashboard not showing resources and environment

Summary

• Fixes dashboard showing "Unknown" for database and cache resources
• Fixes sidebar showing "No environment" instead of "production"

Changes

• DashboardStatsController now fetches databases from environment endpoint (/projects/{uuid}/production) instead of global /databases endpoint which was incomplete
• Added fallback to check global databases filtered by environment_id to catch Dragonfly/KeyDB not included in environment response (Coolify API quirk)
• Simplified EnvironmentSwitcher to use stats.environment data instead of making separate API call

Test plan

• All tests pass (230 tests)
• Lint passes
• Tested with devtrends app - dashboard now shows:
  • Environment: production
  • Primary DB: devtrends-db (PostgreSQL)
  • Redis/Cache: devtrends-cache (Dragonfly)