feat: add Kobo device sync support and fix device route protection

- Add Kobo sync handler with markup, bookmark, analytics, and initialization endpoints
- Add Kobo integration tests and Bruno API test collection
- Move device approve/reject routes from public to protected routes
- Enhance test infrastructure with DATABASE_URL support and helper functions
- Fix device GetDevice handler nil pointer handling
- Clean up test reports and session files

cmd/server/tests/device_test.go

@@ -86,7 +86,7 @@ func TestDeviceRegistrationFlow(t *testing.T) {
 	assert.True(t, ok, "Should have access_token")
 
 	// Step 4: Approve the device
-	req = httptest.NewRequest("GET", fmt.Sprintf("/devices/approve/%s", registrationID), nil)
+	req = httptest.NewRequest("GET", fmt.Sprintf("/api/devices/approve/%s", registrationID), nil)
 	req.Header.Set("Authorization", "Bearer "+token)
 	req.Header.Set("Content-Type", "application/json")
 	rec = httptest.NewRecorder()