Arm effect 7 after the wheel-reset target, select it on the next effect line,
and spawn a second visible live ball when record 149 is consumed. Advance the
second ball through recovered line, circle, ball-ball, magnetic, and scoring
collisions independently.
During multiball, draining one ball leaves the other active without consuming a
remaining player ball. Include secondary state in deterministic traces and
finite-state validation.
Test Plan:
- `cargo test --all-targets` -- 52 passed
- `cargo clippy --all-targets -- -D warnings` -- passed
- production build plus Windows GNU and macOS checks -- passed
- effect-seven spawn, movement, and single-drain lifecycle test -- passed
- `git diff --cached --check` -- passed
ddidderr
f2560ee2f7