Strip native runtime symbols

[FernandoAbishai]

Summary

• strip local symbols from four measured native runtime dylibs with strip -x
• restore ad-hoc staging signatures before runtime probes; electron-builder re-signs packaged artifacts
• strengthen packaged checks with NumPy/OpenBLAS, Numba/llvmlite and Torch execution probes plus nm -m strip invariant

Size

• native runtime bytes removed during clean preparation: 92,694,024
• validated release candidate app: 844,664,204 logical bytes
• validated release candidate DMG: 284,802,926 bytes

Validation

• npm run smoke:runtime-artifacts
• npm run smoke:runtime-contract
• npm run dist:mac:arm64:self-contained
• packaged backend and optional-capability smokes
• real Whisper lifecycle on CPU
• real Whisper lifecycle on MPS
• npm run release:rc:arm64 -- --real-model --use-gpu --require-mps (all release-candidate gates green)

No Developer ID signing or notarization is claimed; the validated candidate remains ad-hoc only.

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