Original scoreboard numeric rows cache updates and packet admission

RE-805. Reproduce with python3 scripts/analyze_qvm_scoreboard_rows.py; focused validation: cargo xtask test-group scoreboard-rows. Machine report.

76 original-instruction probes cover signed ping/packed fields, connection states-minus-one..3, follow cache, bot overrides, status gates and exact1024 capacity boundaries. Name strlen and bounded copy execute actual recovered children; row lengths are supplied and formatting/append/send effects remain captured. Independent models verify attempted versus accepted rows, caches including rejected candidates, header arguments and recipient ID.

Original executable/native runtime and complete Linux/macOS Rust/Bevy/Solari acceptance remain unverified.