Evidence-led capacity/QoS audit of titan-20 (Hermes LLM fallback/
classifier), titan-21 (STT/TTS), and titan-22 (Jellyfin media-primary,
restored) for t_26da4c88. titan-20/21 are CPU-committed with no safe
headroom (titan-20 at 227 MiB free memory at its 24h worst point);
titan-22 has real idle CPU/RAM but its shared-GPU time-slicing has no
VRAM/engine isolation, so no workload is relocated. Adds alerting for
the sharpest gaps found (titan-20 memory exhaustion, titan-22 CPU/RAM/
GPU-VRAM pressure, Jellyfin CPU throttling, titan-21 CPU pressure) and
two Atlas GPU dashboard panels (VRAM, NVENC/NVDEC utilization) so a
future opportunistic-workload PR or a live transcode incident is
visible without a promql session.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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