649ba27669
All 4 RFC 1213 counters now wired to real events: - rx_errors: malformed Ethernet frame or ARP packet - tx_errors: network_file.write_all() failed - rx_dropped: ARP/NDP neighbor resolution failed or queue full - tx_dropped: qdisc returned None (rate-limit kicked in) Stats output now reflects actual error/drop conditions. Mirrors Linux's ifconfig/sar 'errors' and 'dropped' fields.