Don't delete files we need on sync.

Author: handrews

.github/workflows/sync-dev-to-vX.Y-dev.yaml

@@ -49,6 +49,8 @@ jobs:
             # exclude mjs files because we want to sync from the head
             # neutralizes non-zero exit code because an empty selection result returns 1
             git checkout origin/$BASE -- tests/schema/ ':!*.mjs' || echo ""
+            # Preserve the destination branch's schema test runner.
+            git checkout "origin/$BASE" -- tests/schema/schema.test.mjs
             git commit -m "Restored src/ and tests/schema/" || echo ""
             git push -u origin $SYNC
 

.github/workflows/sync-main-to-dev.yaml

@@ -45,6 +45,8 @@ jobs:
           # exclude mjs files because we want to sync from the head
           # neutralizes non-zero exit code because an empty selection result returns 1
           git checkout origin/$BASE -- tests/schema/ ':!*.mjs' || echo ""
+          # Preserve the destination branch's schema test runner.
+          git checkout "origin/$BASE" -- tests/schema/schema.test.mjs
           git commit -m "Restored src/ and tests/schema/" || echo ""
           git push -u origin $SYNC