fix: stop-dev.sh incorrectly detects single-node as multi-node in Docker E2E

is_multinode() counted all [nodes.*] TOML subsections (daemon, nats, awsgw,
etc.) instead of just top-level node entries. A single-node config has ~8
such sections, causing the single-node Docker E2E to use coordinated cluster
shutdown and exit with code 254.

Fix grep to match only [nodes.X] (not [nodes.X.Y]) and preserve the original
test exit code in the cleanup trap.

scripts/stop-dev.sh

@@ -56,7 +56,8 @@ has_service() {
 is_multinode() {
     local config_file="$CONFIG_DIR/hive.toml"
     if [ -f "$config_file" ]; then
-        local node_count=$(grep -c '^\[nodes\.' "$config_file")
+        # Count only top-level node sections [nodes.X], not subsections [nodes.X.Y]
+        local node_count=$(grep -cE '^\[nodes\.[^.]+\]' "$config_file")
         [ "$node_count" -gt 1 ]
     else
         return 1

tests/e2e/run-e2e.sh

@@ -35,6 +35,7 @@ cleanup() {
         fi
     fi
     ./scripts/stop-dev.sh
+    exit $EXIT_CODE
 }
 trap cleanup EXIT