Harden release readiness gates

src/pty.rs

@@ -297,6 +297,8 @@ fn spawn_reader_thread(
 mod tests {
     use super::*;
 
+    const _: () = assert!(PTY_OUTPUT_CHUNK_BYTES <= 1200);
+
     #[test]
     fn terminfo_available_detects_known_and_unknown() {
         // A near-universal entry should be present on any host with ncurses.
@@ -305,9 +307,4 @@ mod tests {
         assert!(!terminfo_available("definitely-not-a-real-terminal-xyz"));
         assert!(!terminfo_available(""));
     }
-
-    #[test]
-    fn pty_output_chunk_size_stays_mtu_safe() {
-        assert!(PTY_OUTPUT_CHUNK_BYTES <= 1200);
-    }
 }