`dataform compile --json` truncates JS-returned SQL to first character

[cjangrist]

Description: When compiling with dataform compile --json (Dataform CLI v3.0.0), any SQL string returned from a js {…} block is truncated to its first character in the JSON graph.

Reproduction Steps:

1. definitions/silver/product/numbers.sqlx:

   config { type: "table", schema: "silver_product", name: "numbers" }
   js { return "SELECT 1 AS test_column"; }
   

2. Run:

   dataform compile --json > graph.json
   

3. In graph.json, you see:

   "query": "S",
   

Expected Behavior: Full SQL string in query, not just its first character.

Actual Behavior: Only first character appears.

Environment:

• @dataform/cli v3.0.0
• Node.js v16.x
• Linux
• workflow_settings.yaml: dataformCoreVersion: 3.0.0

Tried cache-clears, renames, console.log(), simplifying config—nothing resolves the truncation.