feat: add centralized error logging system

- Implemented Error Log API to capture and store error logs from various services.
- Updated admin_ui to include Error Log Viewer component for inspecting logs.
- Enhanced error handling in auth_api, employee_api, and transit_api to report errors to the Error Log API.
- Modified existing services to utilize the new error logging functionality.
- Updated Docker Compose configuration to include the Error Log API service.
- Added error logging service in bus_terminal for Flutter application.

admin_ui/docker-entrypoint.sh

@@ -4,7 +4,8 @@ set -e
 cat > /usr/share/nginx/html/env-config.js <<EOF
 window.__ENV__ = {
   AUTH_API: "${AUTH_API:-http://localhost:5000}",
-  TRANSIT_API: "${TRANSIT_API:-http://localhost:5001}"
+  TRANSIT_API: "${TRANSIT_API:-http://localhost:5001}",
+  ERROR_LOG_API: "${ERROR_LOG_API:-http://localhost:5003}"
 }
 EOF