config(ml-alpha): three sweep YAMLs for deployability validation (X19)
Adds smoke, threshold-tuning, and deployability sweep configurations
per spec 2026-05-19-ml-alpha-v2-trunk-grows-and-deployability-design.md
§3.3, §3.4, §3.6.
sweep_v2_smoke.yaml 1 cell × W0 (cost=0.25, latency=200, th=0.75)
Verifies CheckpointV2 loads + harness OK.
sweep_v2_threshold_tuning.yaml 8 cells × W0 (threshold sweep at realistic anchor)
Single-process fxt-backtest sweep. Picks
the pre-registered production threshold.
sweep_v2_deployability.yaml 560 cells × W1-W4 (cost × latency × threshold)
Argo-fanned out. Feeds emit_deployability_verdict.
__SHA__ placeholders resolved by scripts/argo-lob-sweep.sh --sha at
submission time.
Per spec §3.3, §3.4, §3.6 (X19).