- Enforce upload size limit (100 MB), max extracted files (2000), max
uncompressed size (500 MB), and reject symlinks in MIB archives
- Replace unbounded String.to_atom calls in SNMP tokenizer with
safe_atom/1 that warns when approaching the atom table limit
- Cache MIB vendor listing with persistent_term, invalidated on
upload/delete to avoid blocking synchronous Path.wildcard scans
