refactor: api router groups and auth handling

- require auth for `/api/beszel/getkey`
- Change `GET /api/beszel/send-test-notification` endpoint to `POST /api/beszel/test-notification`.
- add tests for API endpoints

beszel/internal/hub/config/config.go

@@ -10,7 +10,6 @@ import (
 
 	"github.com/google/uuid"
 	"github.com/pocketbase/dbx"
-	"github.com/pocketbase/pocketbase/apis"
 	"github.com/pocketbase/pocketbase/core"
 	"github.com/spf13/cast"
 	"gopkg.in/yaml.v3"
@@ -279,9 +278,8 @@ func createFingerprintRecord(app core.App, systemID, token string) error {
 
 // Returns the current config.yml file as a JSON object
 func GetYamlConfig(e *core.RequestEvent) error {
-	info, _ := e.RequestInfo()
-	if info.Auth == nil || info.Auth.GetString("role") != "admin" {
-		return apis.NewForbiddenError("Forbidden", nil)
+	if e.Auth.GetString("role") != "admin" {
+		return e.ForbiddenError("Requires admin role", nil)
 	}
 	configContent, err := generateYAML(e.App)
 	if err != nil {