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/release_record.py

@@ -124,7 +124,7 @@ def _size(count: int) -> str:
 
 
 def main() -> int:
-    parser = argparse.ArgumentParser(description="Record what a release's packs hold")
+    parser = argparse.ArgumentParser(allow_abbrev=False, description="Record what a release's packs hold")
     parser.add_argument("dist", type=Path, help="directory of the packs to publish")
     parser.add_argument("--tag", required=True, help="release tag, e.g. v2026.10.04")
     parser.add_argument("--install-dir", default="install", type=Path)