Auxiliary column support

.github/workflows/test.yaml

@@ -4,6 +4,7 @@ on:
     branches:
       - main
       - partition-by
+      - auxiliary
 permissions:
   contents: read
 jobs:

TODO

@@ -3,3 +3,11 @@
 - [ ] UPDATE on partition key values
   - remove previous row from chunk, insert into new one?
 - [ ] properly sqlite3_vtab_nochange / sqlite3_value_nochange handling
+
+# auxiliary columns
+
+- later:
+  - NOT NULL?
+  - perf: INSERT stmt should be cached on vec0_vtab
+  - perf: LEFT JOIN aux table to rowids query in vec0_cursor for rowid/point
+    stmts, to avoid N lookup queries