docs/research/QVM_SPAWN_FALLBACK.md

Original fallback spawn distance ranking and selection

RE-864. Reproduce with python3 scripts/analyze_qvm_spawn_fallback.py; focused validation: cargo xtask test-group spawn-fallback. Machine report.

112 original168114 cases execute actual class-hash search and RNG, recovering stable farthest-first insertion,64-entry cap, far-half draw at8+, first-class fallback when blocked, +9 Z and a no-spawn fatal boundary. Telefrag answers and finite sqrt remain supplied; collision/native/runtime parity is open.

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