fix(k8s): remove data sync initContainer + fix --output flag

Training data is already on the PVC — the rclone sync step was
wasting 2-3 minutes per job. Also fixes --output-dir → --output
to match the actual CLI flag.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

infra/k8s/training/job-template.yaml

@@ -72,45 +72,6 @@ spec:
             limits:
               cpu: 500m
               memory: 128Mi
-        # 2. Sync training data from MinIO → PVC (delta-only, fast on repeat runs)
-        - name: sync-training-data
-          image: gitlab-registry.foxhunt.svc.cluster.local:5000/root/foxhunt/foxhunt-training-runtime:latest
-          command: ["/bin/sh", "-c"]
-          args:
-            - |
-              set -e
-              RCLONE_FLAGS="--s3-provider=Minio --s3-endpoint=http://minio.foxhunt.svc.cluster.local:9000 --s3-access-key-id=${MINIO_ACCESS_KEY} --s3-secret-access-key=${MINIO_SECRET_KEY} --s3-no-check-bucket"
-
-              echo "Syncing OHLCV data..."
-              rclone sync ":s3:foxhunt-training-data/futures-baseline" /data/futures-baseline $RCLONE_FLAGS --stats-one-line -v
-              echo "Syncing MBP-10 data..."
-              rclone sync ":s3:foxhunt-training-data/futures-baseline-mbp10" /data/futures-baseline-mbp10 $RCLONE_FLAGS --stats-one-line -v
-              echo "Syncing trades data..."
-              rclone sync ":s3:foxhunt-training-data/futures-baseline-trades" /data/futures-baseline-trades $RCLONE_FLAGS --stats-one-line -v
-
-              echo "Data sync complete:"
-              du -sh /data/futures-baseline/ /data/futures-baseline-mbp10/ /data/futures-baseline-trades/ 2>/dev/null || true
-          env:
-            - name: MINIO_ACCESS_KEY
-              valueFrom:
-                secretKeyRef:
-                  name: minio-credentials
-                  key: access-key
-            - name: MINIO_SECRET_KEY
-              valueFrom:
-                secretKeyRef:
-                  name: minio-credentials
-                  key: secret-key
-          volumeMounts:
-            - name: training-data
-              mountPath: /data
-          resources:
-            requests:
-              cpu: "1"
-              memory: 512Mi
-            limits:
-              cpu: "2"
-              memory: 1Gi
       containers:
         - name: training
           image: gitlab-registry.foxhunt.svc.cluster.local:5000/root/foxhunt/foxhunt-training-runtime:latest
@@ -126,7 +87,7 @@ spec:
             - "--data-dir=/data/futures-baseline"
             - "--mbp10-data-dir=/data/futures-baseline-mbp10"
             - "--trades-data-dir=/data/futures-baseline-trades"
-            - "--output-dir=/output"
+            - "--output=/output"
           env:
             - name: TRAINING_BINARY
               value: train_baseline_supervised