feat(frontend): add trace! to optimizer trace. (#8092)

add `trace!` to optimizer trace. Easier debugging for when a frontend optimization step goes wrong.

Approved-By: kwannoel
Approved-By: fuyufjh

Co-Authored-By: jon-chuang <jon-chuang@users.noreply.github.com>
Co-Authored-By: jon-chuang <9093549+jon-chuang@users.noreply.github.com>

src/frontend/src/optimizer/optimizer_context.rs

@@ -140,7 +140,9 @@ impl OptimizerContext {
             return;
         }
         let mut optimizer_trace = self.optimizer_trace.borrow_mut();
-        optimizer_trace.push(str.into());
+        let string = str.into();
+        tracing::trace!("{}", string);
+        optimizer_trace.push(string);
         optimizer_trace.push("\n".to_string());
     }