- gen_fixtures.rs: version comments now say PROTOCOL_VERSION instead
of hardcoded 14, so they stay correct across bumps
- run-ipc-benchmark: remove --iterations flag that was parsed but
never forwarded to the Rust test (compile-time constant governs)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Six test runner scripts at tests/: run-rust, run-godot, run-ipc-fixtures,
run-ipc-protocol, run-ipc-integration, run-all. Plus run-ipc-benchmark
for Layer 3 timing. All produce structured JSON stdout, support --filter,
and exit 0/non-zero. Makefile targets updated to delegate to scripts.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>