feat: add support for ECDSA and EdDSA keys (#359)

Co-authored-by: Elias Schneider <login@eliasschneider.com>

backend/internal/model/app_config_test.go

@@ -0,0 +1,60 @@
+package model
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAppConfigVariable_AsMinutesDuration(t *testing.T) {
+	tests := []struct {
+		name            string
+		value           string
+		expected        time.Duration
+		expectedSeconds int
+	}{
+		{
+			name:            "valid positive integer",
+			value:           "60",
+			expected:        60 * time.Minute,
+			expectedSeconds: 3600,
+		},
+		{
+			name:            "valid zero integer",
+			value:           "0",
+			expected:        0,
+			expectedSeconds: 0,
+		},
+		{
+			name:            "negative integer",
+			value:           "-30",
+			expected:        -30 * time.Minute,
+			expectedSeconds: -1800,
+		},
+		{
+			name:            "invalid non-integer",
+			value:           "not-a-number",
+			expected:        0,
+			expectedSeconds: 0,
+		},
+		{
+			name:            "empty string",
+			value:           "",
+			expected:        0,
+			expectedSeconds: 0,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			configVar := AppConfigVariable{
+				Value: tt.value,
+			}
+
+			result := configVar.AsDurationMinutes()
+			assert.Equal(t, tt.expected, result)
+			assert.Equal(t, tt.expectedSeconds, int(result.Seconds()))
+		})
+	}
+}