ci: clear proxy env in minio-bucket-init, capture seed pod logs on failure

infra/inttest/run_pipeline.sh

@@ -333,7 +333,6 @@ log "Seeding sandbox database ..."
 if ! kubectl run seed-sandbox \
     --image="$SEED_IMAGE" \
     --restart=Never \
-    --rm \
     --attach \
     --pod-running-timeout=5m \
     --namespace="$NAMESPACE" \
@@ -355,7 +354,9 @@ if ! kubectl run seed-sandbox \
     --env="MINIO_SECRET_KEY=minioadmin" \
     --command -- python -m tests.integration.seed_sandbox; then
   log "FATAL: Database seed failed"
-  debug_pod_failure "seed-sandbox" "run=seed-sandbox"
+  log "Seed pod logs:"
+  kubectl logs seed-sandbox -n "$NAMESPACE" --tail=50 2>&1 || true
+  kubectl delete pod seed-sandbox -n "$NAMESPACE" --ignore-not-found > /dev/null 2>&1 || true
   stage_fail "seed_data"
   PIPELINE_EXIT_CODE=2
   exit 2