Original intermission readiness scan and timeout policy

RE-836. Reproduce with python3 scripts/analyze_qvm_intermission_ready.py; focused validation: cargo xtask test-group intermission-ready. Machine report.

131 original 7525 cases recover connected/entity-flag8 exclusion, nonzero readiness, first16-slot mask and independent counts. Signed wrapped timestamp additions gate a five-second minimum and ten-second wait; all-ready includes an empty eligible set. Actual 6939 next-map transition remains captured.

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