feat(mma): Complete Visual DAG implementation, fix link creation/deletion, and sync docs

src/models.py

@@ -1,10 +1,11 @@
 from __future__ import annotations
 import tomllib
+import os
 from dataclasses import dataclass, field
 from typing import List, Optional, Dict, Any, Union
 from pathlib import Path
 
-CONFIG_PATH = Path("config.toml")
+CONFIG_PATH = Path(os.environ.get("SLOP_CONFIG", "config.toml"))
 
 def load_config() -> dict[str, Any]:
     with open(CONFIG_PATH, "rb") as f: