Shared method-stat ratio and recent-award source composition

RE-811. Reproduce with python3 scripts/analyze_qvm_stat_award_composition.py; focused validation: cargo xtask test-group stat-award-composition. Machine report.

The source fixture maps actor/victim entity records to the same client objects used by method counters and ratio publication, while additional award recipients occupy separate initialized records. Independent models verify unchanged counter/ratio semantics, award recipients and increments at39/40 counts and30000/30001 ages, mode gates, self aliases and exact log arguments. Only leaderboard283622 and7259 logging remain captured at this boundary; original lifecycle ownership and native/runtime parity remain open.

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