fix: update nullable fields

Author: jwilkinson87

src/main/kotlin/com/ctrlhub/core/datacapture/response/FormSchema.kt

@@ -4,6 +4,6 @@ import com.github.jasminb.jsonapi.annotations.Type
 
 @Type("form-schemas")
 data class FormSchema (
-    val id: String,
-    val rawSchema: String,
+    val id: String? = null,
+    val rawSchema: String? = null,
 )

src/test/kotlin/com/ctrlhub/core/datacapture/FormSchemasRouterTest.kt

@@ -43,7 +43,7 @@ class FormSchemasRouterTest {
             assertEquals(1, response.data.size)
             val formSchema = response.data[0]
             assertEquals("1.0.0", formSchema.id)
-            assertTrue(formSchema.rawSchema.isNotEmpty())
+            assertTrue(formSchema.rawSchema?.isNotEmpty() ?: false)
         }
     }
 }