fix(evidence_v2): 将 annulus 降级为 analytic_contours 轮廓

同心圆截面改为输出外圆与内圆两条 analytic_contours 轮廓，避免旧 annulus 宏导致 CDSL 文档不符合 schema 且运行时无法执行

json_to_cdsl/evidence_v2_to_cdsl.py

@@ -412,7 +412,16 @@ def _analytic_profile(sketch: dict[str, Any]) -> dict[str, Any]:
         left, right = drawable
         if math.dist(left["center"], right["center"]) <= EPSILON_MM:
             smaller, larger = sorted(drawable, key=lambda item: item["radius_mm"])
-            return {"type": "annulus", "center": larger["center"], "inner_radius_mm": smaller["radius_mm"], "outer_radius_mm": larger["radius_mm"]}
+            # Annulus is emitted as analytic_contours (outer + inner) so the
+            # generic runtime profile contract accepts the record; ring_revolve
+            # can then revolve the two concentric circles into a hollow solid.
+            return {
+                "type": "analytic_contours",
+                "contours": [
+                    {"role": "outer", "closed": True, "segments": [larger]},
+                    {"role": "inner", "closed": True, "segments": [smaller]},
+                ],
+            }
     if drawable and all(item["type"] == "circle" for item in drawable):
         # Multiple independent circles share the "extrude every closed loop" intent;
         # emit them as analytic_contours (one outer contour per circle) so the