Release 4.9.0

SN34's earlier identity: Filed under SN34 from a source its on-chain identity named before. The identity has changed and no longer names this source, so the item is not listed as news of the subnet on SN34 now.

Incentive Mechanism: Burn Eliminated, Audio Activated The emission split changes for the first time since audio entered the exam pipeline (#412): Category 4.8.x 4.9.0 Burn 0.20 0.00 Image discriminators 0.30 0.40 Video discriminators 0.35 0.40 Audio discriminators 0.00 0.04 Generators 0.15 0.16 Audio detection models now earn live incentive for the first time. Security Hardening A full dependency audit against the repo's 120 open Dependabot alerts (#411). Fixes the one critical (h11 malformed chunked-encoding, unblocked by bumping our stale httpcore pin) and ~22 of 27 unique high-severity alerts, including: pillow 10.4 → 12.2 — out-of-bounds writes parsing malformed images. Validators parse miner-submitted media, so this was the bump that mattered most. diffusers 0.36 → 0.38 — trust_remote_code bypass via custom pipeline components. Transitive fixes across the board: GitPython (command injection / RCE chain), urllib3, cryptography, msgpack, protobuf, and ~150 others via a full lockfile upgrade. Also in #407: media store queries hardened with fully parameterized SQL, and epistula timestamp validation tightened (future-dated timestamps now rejected). Alerts deliberately left open: aiohttp/starlette/setuptools (hard-blocked by bittensor 9.9.0's own pins) and torch/transformers (major-version jumps not worth the GPU-stack risk for medium-severity alerts). Much Leaner Validator Installs gasbench packaging split (#413, gasbench#123): the subnet now installs only gasbench's dataset registry (pyyaml) instead of its full inference stack. Drops onnxruntime-gpu, torchaudio, torchcodec, timm, fvcore, decord, modelscope, scikit-image, open-clip-torch and more from validator environments. Web scraper subsystem deleted (#407) — it had zero callers and took selenium, Chrome, and the xvfb runtime stack with it. 10 unused direct dependencies removed (#411) — onnx, asyncpg, python-multipart, and a set of cargo-culted transitive pins. Verified zero imports before removal. Smaller insta

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