fix: update test for explicit error handling

hive/services/viperblockd/viperblockd_handlers_test.go

@@ -470,9 +470,13 @@ func TestIntegration_EBSUnmountInvalidJSON(t *testing.T) {
 	require.NoError(t, err)
 	defer nc.Close()
 
-	// Current code silently returns without responding on unmarshal failure
-	_, err = nc.Request("ebs.test-node.unmount", []byte("not json {{{"), 1*time.Second)
-	assert.Error(t, err, "expected timeout because handler silently drops invalid JSON")
+	// Handler responds with an error payload on invalid JSON
+	msg, err := nc.Request("ebs.test-node.unmount", []byte("not json {{{"), 1*time.Second)
+	require.NoError(t, err, "handler should respond even on invalid JSON")
+
+	var resp types.EBSUnMountResponse
+	require.NoError(t, json.Unmarshal(msg.Data, &resp))
+	assert.Contains(t, resp.Error, "bad request")
 }
 
 // --- ebs.delete with VB instance (StopWALSyncer path) ---

scripts/check-coverage.sh

@@ -26,7 +26,7 @@ if [[ -z "$QUIET" ]]; then
     go tool cover -func="$PROFILE" | tail -1
 fi
 
-PASS=$(echo "$TOTAL >= $MIN" | bc -l)
+PASS=$(awk "BEGIN {print ($TOTAL >= $MIN) ? 1 : 0}")
 if [[ "$PASS" != "1" ]]; then
     echo "ERROR: Total coverage ${TOTAL}% is below minimum ${MIN}%"
     exit 1

scripts/start-dev.sh

@@ -255,20 +255,15 @@ if has_service "nats"; then
     set_oom_score "nats" "-500"
     check_service "NATS" "$NATS_CHECK_HOST" "4222"
 
-    # Ensure NATS JetStream is ready before Predastore starts.
+    # Wait for NATS JetStream to be ready before Predastore starts.
     # Predastore lazily opens IAM KV buckets — it starts with config-only auth
     # and activates IAM auth once the hive daemon creates the KV buckets.
     echo "🔍 Waiting for NATS JetStream..."
     NATS_JS_READY=false
     for i in $(seq 1 15); do
-        if nats -s nats://$NATS_CHECK_HOST:4222 stream ls --names 2>/dev/null | grep -q "KV_" 2>/dev/null; then
-            echo "   ✅ NATS JetStream is ready (KV streams found)"
-            NATS_JS_READY=true
-            break
-        fi
-        # JetStream may be up with no KV buckets yet (fresh install before admin init)
-        if nats -s nats://$NATS_CHECK_HOST:4222 account info 2>/dev/null | grep -q "JetStream" 2>/dev/null; then
-            echo "   ✅ NATS JetStream is ready (no KV buckets yet — run 'hive admin init' to bootstrap)"
+        # Send a NATS INFO probe — JetStream-enabled servers include "jetstream" in the INFO response
+        if echo "" | nc -w 1 "$NATS_CHECK_HOST" 4222 2>/dev/null | grep -q "jetstream"; then
+            echo "   ✅ NATS JetStream is ready"
             NATS_JS_READY=true
             break
         fi