Pair recipient numeric payload gates and cache aliases

RE-763. Reproduce with python3 scripts/analyze_qvm_recipient_pair.py; validate with cargo xtask test-group recipient-pair. See the machine report.

Recovered180091..180739 across73 pair/status/class/name/gate/self-alias fixtures. Independent numeric projection verifies both argument blocks, recipient index and cache writes. The initial unaligned literal copy remains excluded; supplied strlen and captured copy/format/send boundaries preserve uncertainty about serialized text and original networking.

No original executable/full VM/native world collision or rendering runs. Supplied callback/native responses and fixture domains remain explicit; complete macOS/Linux Rust/Bevy/Solari gameplay remains open.