feat: support TraceLowLevelEvent::CompoundValue in write_trace()

Author: nickysn

runtime_tracing/src/capnptrace.rs

@@ -423,7 +423,13 @@ pub fn write_trace(q: &[crate::TraceLowLevelEvent], output: &mut impl std::io::W
                 let mut ret = event.init_drop_variable();
                 ret.set_i(varid.0.try_into().unwrap());
             }
-            TraceLowLevelEvent::CompoundValue(cvr) => todo!(),
+            TraceLowLevelEvent::CompoundValue(cvr) => {
+                let mut ret = event.init_compound_value();
+                let mut ret_place = ret.reborrow().init_place();
+                ret_place.set_p(cvr.place.0.try_into().unwrap());
+                let ret_value = ret.init_value();
+                conv_valuerecord(ret_value, &cvr.value);
+            }
             TraceLowLevelEvent::CellValue(cvr) => todo!(),
             TraceLowLevelEvent::AssignCompoundItem(aci) => todo!(),
             TraceLowLevelEvent::AssignCell(acr) => todo!(),