Add messages to properties ans parernts

proto/caosdb/entity/v1alpha1/main.proto

@@ -344,6 +344,12 @@ message Property {
   string unit = 6;
   // Property datatype
   string datatype = 7;
+  // Errors of this property
+  repeated Message errors = 8;
+  // Warnings of this property
+  repeated Message warnings = 9;
+  // Info messages of this property
+  repeated Message infos = 10;
 }
 
 // Parent of an entity.
@@ -354,6 +360,12 @@ message Parent {
   string name = 2;
   // Description of the parent entity.
   string description = 3;
+  // Errors of this parent
+  repeated Message errors = 4;
+  // Warnings of this parent
+  repeated Message warnings = 5;
+  // Info messages of this parent
+  repeated Message infos = 6;
 }