Method createNode

src/extraction/tree-sitter.ts:1308–1377

* Create a Node object

(
    kind: NodeKind,
    name: string,
    node: SyntaxNode,
    extra?: Partial<Node>
  )

   * Create a Node object
   */
  private createNode(
    kind: NodeKind,
    name: string,
    node: SyntaxNode,
    extra?: Partial<Node>
  ): Node | null {
    // Skip nodes with empty/missing names — they are not meaningful symbols
    // and would cause FK violations when edges reference them (see issue #42)
    if (!name) {
      return null;
    }

    const id = generateNodeId(this.filePath, kind, name, node.startPosition.row + 1);

    // Some grammars (e.g. Dart) model a function/method body as a *sibling* of
    // the signature node, so the declaration node's own range is just the
    // signature line. Extend endLine to the resolved body when it sits beyond
    // the node so the node spans its body — required for any body-level analysis
    // (callees, the callback synthesizer's body scan, context slices). Guarded to
    // only ever extend: for child-body grammars the body is within range (no-op).
    let endLine = node.endPosition.row + 1;
    if (kind === 'function' || kind === 'method') {
      const body = this.extractor?.resolveBody?.(node, this.extractor.bodyField);
      if (body && body.endPosition.row + 1 > endLine) {
        endLine = body.endPosition.row + 1;
      }
    }

    const newNode: Node = {
      id,
      kind,
      name,
      qualifiedName: this.buildQualifiedName(name),
      filePath: this.filePath,
      language: this.language,
      startLine: node.startPosition.row + 1,
      endLine,
      startColumn: node.startPosition.column,
      endColumn: node.endPosition.column,
      updatedAt: Date.now(),
      ...extra,
    };

    // Persist extra symbol-level modifiers (e.g. Kotlin `expect`/`actual`) onto
    // the node's decorators list so the resolver can pair multiplatform
    // declarations with their implementations. Merged, not overwritten, so a
    // language that also captures real annotations keeps both.
    const mods = this.extractor?.extractModifiers?.(node);
    if (mods && mods.length > 0) {
      newNode.decorators = [...(newNode.decorators ?? []), ...mods];
    }

    this.nodes.push(newNode);

    // Add containment edge from parent
    if (this.nodeStack.length > 0) {
      const parentId = this.nodeStack[this.nodeStack.length - 1];
      if (parentId) {