fixing tests4 - columns have required flag from now on

common/src/proto/komp_ac.table_definition.rs

@@ -158,6 +158,9 @@ pub struct ColumnDefinition {
     /// for every other field type.
     #[prost(string, tag = "5")]
     pub currency: ::prost::alloc::string::String,
+    /// When true, the server rejects omitted or explicitly null values.
+    #[prost(bool, tag = "6")]
+    pub required: bool,
 }
 /// Response after table creation (success + DDL preview).
 #[derive(serde::Serialize, serde::Deserialize)]