feat(block-editor): wire Rotation, Alignment and Flip parameter placement

Enable the existing palette rows and BPARAMETER choices. Rotation accepts a
center, picked or numeric radius, and picked or numeric default angle.
Alignment places a tangent direction from its base point. Flip places a
reflection line and state label, with native grip and state expressions.

Extend shared graph append/capacity checks for Flip's additional state node
while preserving existing subgraphs. Keep Polar/Rotation angle labels unique
in either placement order. Add editor graphics, extents and definition
reframing through the existing overlay/history/save paths.

This milestone implements native parameter placement and persistence.
Rotate/Flip action association, reference alignment/grip editing, parameter
property editing and parameter sets remain separate work.

Validation covers command and palette placement, cancellation, local/parent
undo, save/discard, native DWG/DXF objects, existing graph preservation and
the 17 research fixtures. Broader block/dock regressions and editor renders
are also checked.

src/scene/modify.rs

@@ -565,6 +565,12 @@ impl Scene {
                 block_record,
                 local_from_old,
             );
+        let parameter_changes = parameter_changes
+            + super::block_orientation_parameter::reframe(
+                &mut self.document,
+                block_record,
+                local_from_old,
+            );
         if !changed.is_empty() || parameter_changes > 0 {
             self.rebuild_derived_caches();
         }