fix(codegen): generate terminal resource objects

Was trying to generate a terminal connection token, but codegen
incorrectly uses terminal as an object (instead of as a resource), leading to requests for terminal
objects (like terminal.connection_token) being mislabeled in the map,
and those objects not being found when it came time to generate impl's
for their requests

openapi/src/metadata.rs

@@ -209,6 +209,9 @@ pub fn metadata_requests<'a>(
             // special case for usage_records
             (_, _, Some("usage_records")) => "usage_records".to_string(),
 
+            // special case: terminal is a resource, not an object
+            (Some("terminal"), Some(x), _) => format!("terminal.{}", x),
+
             (Some(x), _, _) => x.to_string(),
             _ => {
                 // this should never happen