model: suppress datums and partitions: kept, but left out of the model (#291)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

crates/engine/src/cmd/mod.rs

@@ -57,6 +57,8 @@ pub static ALL: &[CommandSpec] = &[
     view::ISOLATE,
     view::SHOW_ALL,
     datum::PARTITION,
+    datum::DATUM_SUPPRESS,
+    datum::PARTITION_SUPPRESS,
     datum::PARTITION_DELETE,
     mesh::NODE_ADD,
     mesh::NODE_REMOVE,