P9 complete: compiled kernels validated (byte-identical, 78-80 GSA samples/min/core), scaling report

Graviton3 c7g.8xlarge, 360 GSE165845 arrays: 360/360 GTCs identical between the Rust
kernels and the pure-Python paths; 1 worker 78-80 samples/min (pure Python 29.6).
Scaling 1->8 workers efficiency 0.87-0.90; above that the 125 MB/s gp3 disk caps the
run (~620 samples/min) and, on a RAM disk, a fixed per-worker start-up cost limits a
360-sample batch to efficiency 0.48 at 32 workers (K-025). Worker state is pickled once.
docs/validation/P9.md, result JSONs, guide/README/CHANGELOG updates.

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## Unreleased (P9)
+
+Optional compiled kernels `rust/simurg-core` (PyO3): fused GenCall calling and BAF/LRR, libm maps with CPython
+semantics, normalization nearest-neighbour searches, BPM parser. Byte-identical outputs to the pure-Python paths
+(`SIMURG_PURE_PYTHON=1`); 78–80 GSA samples/min per Graviton3 core (pure Python 30), manifest loading 4× faster.
+Address coverage memoised per IDAT layout; worker state pickled once. `bench/profile_genotype.py`,
+`bench/scaling.py`. Details and scaling limits: `docs/validation/P9.md`.
+
 ## 1.0.0 — 2026-09-28
 
 First release: the v1.0 goals of the master plan (§1.1), built and validated phase by phase (P0–P8).