Fix retract keys sort order in PrintConfig (debug build crash)

[appositeit]

Summary

• Fix alphabetical sort order of m_extruder_retract_keys and m_filament_retract_keys in PrintConfig.cpp
• retract_length_toolchange and retract_restart_extra_toolchange were appended at the end of the sorted lists instead of being inserted at their correct alphabetical positions
• This causes std::is_sorted assertion failure and immediate crash on startup in debug builds (-DCMAKE_BUILD_TYPE=Debug)

Root Cause

When the toolchange retraction keys were added to Snapmaker Orca, they were appended at the end of the sorted key lists. Alphabetically, retract_le... sorts before retract_li..., and retract_restart_extra_toolchange sorts after retract_restart_extra but before retract_when_changing_layer.

Fix

Move the keys to their correct alphabetical positions:

• retract_length_toolchange → after retract_before_wipe, before retract_lift_above
• retract_restart_extra_toolchange → after retract_restart_extra, before retract_when_changing_layer

Test plan

• Verified sort order using sort utility: extracted keys, sorted, diffed — no differences
• Debug build starts successfully without assertion failure
• Release build unaffected (assertions disabled)

🤖 Generated with Claude Code

[appositeit]

Hi! I noticed you've closed all the bugs I raised. Is that because they were not useful, or they were wrong, or you didn't understand that they were causing compilation errors?