feat(infra): optional nsys profiling in Argo template (-p nsys-profile=true)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

infra/k8s/argo/alpha-rl-template.yaml

@@ -59,6 +59,8 @@ spec:
         value: "1"
       - name: n-eval-steps
         value: "0"
+      - name: nsys-profile
+        value: "false"
 
   volumes:
     - name: git-ssh-key
@@ -164,7 +166,13 @@ spec:
             OUT="/feature-cache/alpha-rl-runs/$SHA/fold{{workflow.parameters.fold-idx}}"
             mkdir -p "$OUT"
             echo "=== Train on $(nvidia-smi --query-gpu=name --format=csv,noheader) ==="
-            stdbuf -oL ${CARGO_TARGET_DIR}/release/examples/alpha_rl_train \
+            TRAIN_BIN="${CARGO_TARGET_DIR}/release/examples/alpha_rl_train"
+            if [ "{{workflow.parameters.nsys-profile}}" = "true" ]; then
+              TRAIN_CMD="nsys profile -o $OUT/nsys_trace --stats=true --force-overwrite=true $TRAIN_BIN"
+            else
+              TRAIN_CMD="stdbuf -oL $TRAIN_BIN"
+            fi
+            $TRAIN_CMD \
               --mbp10-data-dir /data/futures-baseline-mbp10/ES.FUT \
               --predecoded-dir /feature-cache/predecoded \
               --out "$OUT" \