skills: allow single-attempt Tier 3 validation

Disable early stopping so the NVSkills canonical Tier 3 override can run with one attempt instead of being rejected before agent evaluation. Preserve the normal two-attempt configuration and Mitch's evaluator image-mode fixes.

Signed-off-by: Thomas Alexander <talexander@nvidia.com>

Author: taalexander

skills/develop-cudaq-pass/evals/config.yml

@@ -11,7 +11,9 @@ harbor:
   base_image_mode: reuse
   n_attempts: 2
   pass_threshold: 0.60
-  stop_on_pass: true
+  # NVSkills validates canonical Tier 3 coverage with a single-attempt
+  # override, which is incompatible with early stopping.
+  stop_on_pass: false
   n_concurrent: 2
   max_agents: 2
   # Generated tasks default to 300 seconds. Preserve a 900-second ceiling for