qunatity ledger in table definition

common/src/proto/komp_ac.table_definition.rs

@@ -166,6 +166,10 @@ pub struct ColumnDefinition {
     /// MONEY rounding applied before a value is stored.
     #[prost(enumeration = "MoneyRounding", tag = "4")]
     pub rounding: i32,
+    /// When true, this numeric column is server-owned and projected from the
+    /// profile quantity ledger.
+    #[prost(bool, tag = "5")]
+    pub quantity_ledger: bool,
 }
 /// Response after table creation (success + DDL preview).
 #[derive(serde::Serialize, serde::Deserialize)]

common/src/proto/komp_ac.table_structure.rs

@@ -55,6 +55,9 @@ pub struct TableColumn {
     /// Typically true for the "id" column created by the system.
     #[prost(bool, tag = "4")]
     pub is_primary_key: bool,
+    /// True when this column is projected from the profile quantity ledger.
+    #[prost(bool, tag = "5")]
+    pub quantity_ledger: bool,
     /// True when the server created this as a companion of another logical column.
     #[prost(bool, tag = "6")]
     pub generated: bool,