feat: integrate SimpleCADAPI 2.0.2 CAD workflows

SimpleCADAPI/skills/simplecadapi/references/docs/api/ModelResult.md

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+# ModelResult
+
+## Class Definition
+
+```python
+@dataclass(frozen=True)
+class ModelResult:
+    value: Any
+    session: GraphSession
+    result_node_ids: Tuple[str, ...]
+    model_json: str
+    session_json: str
+    artifact_paths: Mapping[str, Path] = field(default_factory=dict)
+```
+
+*Source: graph.py*
+
+## Import Surface
+
+- top-level: `from simplecadapi import ModelResult`
+
+## Description
+
+Immutable result returned by a function decorated with `@scad.model`.
+It contains the ordinary Python return value, the completed graph session, the
+explicit result node ids, the model/session JSON artifacts, and any paths
+written by automatic artifact export.
+
+```python
+result = build_model()
+rebuilt = result.replay()
+```
+
+`replay()` replays `result.model_json`. Use `result.value` for the application
+return value and `result.result_node_ids` to inspect the captured graph outputs.
+Use `result.export_artifacts(output_dir=...)` to write one self-contained
+`<graph_id>.scene.zip` after the model runs. The package embeds model JSON,
+mapped project-relative Python sources, and render/selection assets; automatic
+export does not write adjacent model/session JSON, STEP, STL, or FCStd files.