privacy: scrub host chip/OS from model card

README.md

@@ -87,7 +87,7 @@ pip install coreai-catalog && coreai-catalog install pi05-base
 
 - **Gate A (structure): passed** — the bundle's layout + metadata were
   validated on real hardware; the graphs load.
-- **Gate B — action_parity: 96.2% min chunk-cosine** vs the fp16 reference over 16 frames of `recorded episodes`, 10-step, fixed-noise (measured on Apple M4 Max).
+- **Gate B — action_parity: 96.2% min chunk-cosine** vs the fp16 reference over 16 frames of `recorded episodes`, 10-step, fixed-noise (measured on Apple Silicon).
 - **Near-zero-action note (full disclosure):** the 96.2% is the raw MIN over all frames, dominated by frame(s) where the reference action is ~zero (the robot barely moves) and chunk-cosine is mathematically ill-conditioned. The **median chunk-cosine is 99.9%** and the **max ABSOLUTE per-dim action error is 0.0193** (normalized) — i.e. behaviorally faithful everywhere. This model class is gated on the absolute action error (behaviorally meaningful) since cosine is undefined for ~zero actions; every raw number is reported here and in `parity-report.json`. fabric never fakes a number.
 - This certifies the export is **numerically faithful to the source policy** — it
   does **NOT** certify real-world task success, embodiment transfer, or