Boolean property tests: nightly only, and the cases they found as ignored tests (#1650)

Pushes to main skip boolean_props (random inputs); the nightly property-tests job runs it. The three shrunk cases are ignored tests with their issues (#1647, #1648, #1649), and proptest's failure file is named outright.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

CONTRIBUTING.md

@@ -181,7 +181,8 @@ Pull requests skip a few heavy tests (one to four minutes each), which run on ev
   `pattern_suppress_tests::enclosure_arc_extinction_keeps_a_real_sharp_inner_lip_after_resize_and_reopen`,
   `pattern_suppress_tests::enclosure_datums_follow_wall_height_and_board_depth_with_material_proofs`,
   `cmd::plastic::tests::enclosure_snap_fit_follows_resized_front_wall`, the `atomic_commands` contract tests
-- `solidcraft-kernel`: `tests::boolean_identity_on_tangent_primitives`, the `boolean_props` property tests
+- `solidcraft-kernel`: `tests::boolean_identity_on_tangent_primitives`, and the `boolean_props` property tests
+  (these run only in the nightly "Property tests" job: their inputs are random, so main skips them too)
 - `solidcraft-ui-egui` scenarios: `acceptance_sensor_enclosure`
 
 **The action matrix** tries every ordinary action on every face, edge, vertex and body of a