toolchain: log warning when pyrometheus CCE workaround patch applies

When the Cray+ACC GPU_ROUTINE macro patch successfully replaces the
broken _CRAYFTN/#ifdef block in pyrometheus-generated m_thermochem.f90,
emit a yellow warning so engineers can tell the workaround is active
and will notice when pyrometheus eventually fixes the upstream issue.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Spencer Bryngelson

toolchain/mfc/run/input.py

@@ -119,6 +119,10 @@ def generate_fpp(self, target) -> None:
                         "Cray+ACC GPU_ROUTINE macro patch did not apply. "
                         "Update the pattern in toolchain/mfc/run/input.py."
                     )
+            else:
+                cons.print("[yellow]Warning: Applied CCE 19.0.0 workaround patch to pyrometheus-generated "
+                           "m_thermochem.f90 (replaced _CRAYFTN GPU_ROUTINE macro with !$acc routine seq). "
+                           "Remove this patch once pyrometheus emits correct Cray+ACC directives upstream.[/yellow]")
             thermochem_code = patched
 
         common.file_write(