feat: Implement storage provider management functionality

- Added new routes and handlers for managing storage providers, including creation, editing, and deletion.
- Introduced a new StorageProvider form component for user input.
- Enhanced the database schema to support storage provider references in transfer configurations.
- Implemented encryption for sensitive fields in storage provider data.
- Added tests for storage provider API endpoints and integration with the database.
- Updated frontend components to support storage provider selection and testing.

internal/encryption/audit/monitor_test.go

@@ -0,0 +1,99 @@
+package audit
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+)
+
+// MockAuditor is a mock implementation of an auditor
+type MockAuditor struct {
+	mock.Mock
+}
+
+// LogEvent implements the required interface method
+func (m *MockAuditor) LogEvent(event AuditEvent) {
+	m.Called(event)
+}
+
+// MockAlertHandler is a mock implementation of an AlertHandler
+type MockAlertHandler struct {
+	mock.Mock
+}
+
+// HandleAlert implements the AlertHandler interface
+func (m *MockAlertHandler) HandleAlert(alert SecurityAlert) {
+	m.Called(alert)
+}
+
+func TestSecurityMonitor(t *testing.T) {
+	// Create mocks
+	mockAuditor := new(MockAuditor)
+	mockAlertHandler := new(MockAlertHandler)
+
+	// Create the monitor
+	monitor := NewSecurityMonitor(mockAuditor)
+	monitor.SetAlertHandler(mockAlertHandler)
+
+	// Set up expectations
+	testEvent := AuditEvent{
+		Type:        "key_rotation",
+		Description: "Key rotation completed",
+		Timestamp:   time.Now(),
+	}
+
+	// The original auditor will be called
+	mockAuditor.On("LogEvent", testEvent).Return()
+
+	// Replace the auditor's LogEvent with our wrapped version
+	wrappedLogEvent := monitor.AttachToAuditor()
+
+	// Call the wrapped function
+	wrappedLogEvent(testEvent)
+
+	// Verify the expectations
+	mockAuditor.AssertExpectations(t)
+
+	// Test alert generation and handling
+	mockAlertHandler.On("HandleAlert", mock.Anything).Return()
+
+	errorEvent := AuditEvent{
+		Type:        "error",
+		Description: "Failed to decrypt data: invalid key",
+		Timestamp:   time.Now(),
+		Success:     false,
+	}
+
+	// Process the error event directly to test alert generation
+	monitor.ProcessEvent(errorEvent)
+
+	// Verify alert was handled
+	mockAlertHandler.AssertExpectations(t)
+
+	// Test reporting functionality
+	report := monitor.GenerateReport()
+	assert.Contains(t, report.EventCounts, "key_rotation")
+	assert.Contains(t, report.ErrorCategories, "decryption_error")
+}
+
+func TestClassifyError(t *testing.T) {
+	testCases := []struct {
+		errorMsg      string
+		expectedClass string
+	}{
+		{"failed to decrypt data", "decryption_error"},
+		{"encryption operation failed", "encryption_error"},
+		{"invalid key format", "key_error"},
+		{"unauthorized access to encryption key", "permission_error"},
+		{"some other random error", "other_error"},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.errorMsg, func(t *testing.T) {
+			result := classifyError(tc.errorMsg)
+			assert.Equal(t, tc.expectedClass, result)
+		})
+	}
+}