Added connection string display to System Information section of dashboard.
- Injected IConfiguration into DashboardController
- Added ConnectionString to ViewData
- Displayed in monospace code format for easy reading
- Shows actual runtime connection string from configuration
- Helps verify which database file is being used in different environments
This makes it easier to troubleshoot database location issues, especially
when deploying to different environments (Development, Production, CT109, etc.).
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Co-Authored-By: Claude <noreply@anthropic.com>