add some more partial data

schema/ancestries.sql

@@ -59,6 +59,16 @@ CREATE TABLE traits (
   description TEXT NOT NULL
 );
 
+CREATE TABLE heritages_traits (
+  id INTEGER PRIMARY KEY,
+  heritage_id INTEGER NOT NULL,
+  trait_id INTEGER NOT NULL,
+  UNIQUE(heritage_id, trait_id),
+  FOREIGN KEY (heritage_id) REFERENCES heritages(heritage_id),
+  FOREIGN KEY (trait_id) REFERENCES traits(trait_id)
+);
+
+/* has partial data */
 CREATE TABLE ancestries_traits (
   id INTEGER PRIMARY KEY,
   ancestry_id INTEGER NOT NULL,