fix: refuse abbreviated flags in every script

argparse completed a prefix into the only flag starting with it:
slots.py --emulator read profiles from a directory named after the
emulator and reported nothing, and pipeline.py --all built every pack
variant. Every parser now refuses an abbreviation.

scripts/generate_truth.py

@@ -36,6 +36,7 @@ DEFAULT_DB_FILE = "database.json"
 
 def parse_args(argv: list[str] | None = None) -> argparse.Namespace:
     parser = argparse.ArgumentParser(
+        allow_abbrev=False,
         description="Generate ground-truth YAML from emulator profiles",
     )
     group = parser.add_mutually_exclusive_group(required=True)