chore: merge pack and verify fixes

scripts/common.py

@@ -3036,12 +3036,16 @@ SYSTEM_ALIASES: dict[str, str] = {
 }
 
 
+@functools.lru_cache(maxsize=None)
 def _norm_system_id(sid: str) -> str:
     """Normalize system ID for cross-platform matching.
 
     Resolves known aliases, then strips manufacturer prefixes and separators
     so that platform-specific IDs (e.g., "xbox", "nintendo-wiiu") match
     profile IDs (e.g., "microsoft-xbox", "nintendo-wii-u").
+
+    A function of the string and two constant tables: a manifest run asks it
+    1.7 million times for about 1,100 ids.
     """
     s = sid.lower().replace("_", "-")
     s = SYSTEM_ALIASES.get(s, s)