fix(generator): correct service pool count in _SVC_MIN/_SVC_MAX comment
BLE001 is not in ruff.toml select (F/ANN/RUF/E/W only); the suppressions
were whispering apologies to a linter that wasn't listening. Generator
comment now cites the actual ~28-entry non-singleton service pool.
_take_ip and _new_decky were closures capturing outer-scope state. Promoted to
module-level with explicit parameters. seen_service_pairs name makes the intent
clear — it prevents the same service frozenset from being assigned repeatedly.
