Sheet metal: an Edge Flange can choose its own corner relief (#1481)

An Edge Flange feature can set the shape and size of the relief at the corners its flanges make, in place of the sheet metal rule's. Design format 24.

Co-authored-by: NOWN-DEV <NOWN-DEV@users.noreply.github.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

crates/doc/src/feature_walk_tests/fixtures.rs

@@ -114,7 +114,7 @@ pub(super) fn fixtures() -> Vec<(&'static str, Value)> {
         ("sheet_contour", json!({"type": "sheet_contour", "sketch": 1, "curves": ["l1"], "distance": "contour.distance"})),
         (
             "sheet_flange",
-            json!({"type": "sheet_flange", "edges": [{"point": o, "angle": "flange.e1_angle", "height": "flange.e1_height"}, {"point": o, "angle": null, "height": "flange.e2_height"}], "height": "flange.height", "angle": "flange.angle", "radius": "flange.radius"}),
+            json!({"type": "sheet_flange", "edges": [{"point": o, "angle": "flange.e1_angle", "height": "flange.e1_height"}, {"point": o, "angle": null, "height": "flange.e2_height"}], "height": "flange.height", "angle": "flange.angle", "radius": "flange.radius", "corner_relief_shape": "round", "corner_relief": "flange.relief"}),
         ),
         ("sheet_hem", json!({"type": "sheet_hem", "edges": [o], "length": "hem.length", "gap": "hem.gap"})),
         (

crates/doc/src/feature_walk_tests/golden_exprs.txt

@@ -243,7 +243,8 @@ sheet_flange
     Edge angle = flange.e1_angle (Angle)
     Edge height = flange.e1_height (Length)
     Edge height = flange.e2_height (Length)
-  expressions: flange.height, flange.angle, flange.radius, flange.e1_angle, flange.e1_height, flange.e2_height
+    Corner relief = flange.relief (Length)
+  expressions: flange.height, flange.angle, flange.radius, flange.e1_angle, flange.e1_height, flange.e2_height, flange.relief
 sheet_hem
   inputs:
     Length = hem.length (Length)