fix(H2C): carousel nozzle change zone — ramming depth, M632 barriers, preheat suppression

- Add nozzle_change_depth override for carousel rotations (same extruder,
  different nozzle) in plan_toolchange() and plan_tower_new() — previously
  depth was 0 because condition checked m_filament_map (extruder-level)
  instead of m_filament_nozzle_map (nozzle-level)
- Emit M632/M633 carousel barriers inside NOZZLE_CHANGE_START/END markers
  in nozzle_change_new(), matching BBS ramming() L3421-3429 pattern
- Add is_extruder_change flag to NozzleChangeResult (matches BBS field)
  to propagate carousel/extruder-change distinction downstream
- Suppress duplicate M632 in add_M104_by_requirement for carousel —
  M632 already emitted inside nozzle_change_new(); extruder change
  preheat M104 preserved (BBS has no add_M104_by_requirement at all)

Reference to BBS: BambuStudio/src/libslic3r/GCode/WipeTower.cpp
  ramming() extruder_change flag, is_need_ramming(), plan_toolchange()

src/libslic3r/Print.cpp

@@ -3940,6 +3940,9 @@ void Print::_make_wipe_tower()
                              m_wipe_tower_data.tool_ordering.empty() ? 0.f : m_wipe_tower_data.tool_ordering.back().print_z, m_wipe_tower_data.tool_ordering.all_extruders());
         wipe_tower.set_has_tpu_filament(this->has_tpu_filament());
         wipe_tower.set_filament_map(this->get_filament_maps());
+        // Vortek H2C: pass nozzle-level map for carousel rotation detection in tool_change_new()
+        // Reference to BBS: BambuStudio/src/libslic3r/GCode/WipeTower.hpp set_nozzle_group_result()
+        wipe_tower.set_filament_nozzle_map(this->get_filament_nozzle_maps());
         // Feed the has_filament_switcher device flag (develop-only dynamic key, read defensively from
         // the full config — no shipping profile sets it) and the shared printable bed used by the PETG
         // pre-extrusion offset clamp. Both are inert unless has_filament_switcher is set.