v0.6.17: Full-memory Blackwell residency

Extend explicit hybrid/Veda trunk residency to single SM120 allocations with at least 90 GiB. A same-PRO-6000-Server A/B/A2 comparison completed nine videos: warm five-second latency improved 18.1% and a matched fifteen-second request 3.3% versus the faster return control, while initialization plus first output increased 18.4 seconds. Peak host RSS fell from 108.7 to 68.7 GiB. Use total batch time when selecting residency; the tested three-output batch did not amortize startup. Default block-ring behavior, I2VA limits, allocator requirement and smaller-card exclusions remain. See scope and evidence.