Original target selection with actual field search and random generator

RE-858. Reproduce with python3 scripts/analyze_qvm_target_pick.py; focused validation: cargo xtask test-group target-pick. Machine report.

168 original 276586 cases compose actual 276505/69386 matching and actual36717 random state updates. At most32 matches are collected; random state advances exactly once only when matches exist, then selects by modulo. Five six-step RNG sequences and null/missing diagnostic paths are verified. Native initialization/world ownership remain open.

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