fix: port BBS NozzleStatusRecorder pattern for per-carousel-slot purge tracking

The upstream _make_wipe_tower() tracked purge volumes per-extruder (2 slots),
which collapsed all H2C carousel filaments into one slot and caused massive
redundant AMS flushing (~40g instead of ~0.4g).

Changes:
- Print.cpp: Replace per-extruder nozzle_cur_filament_ids with BBS
  NozzleStatusRecorder that tracks per group_id (carousel slot 0..6).
  Use get_nozzle_for_filament() to resolve physical slot per layer.
  Select filament_prime_volume_nc for nozzle changes, filament_prime_volume
  for filament changes (BBS pattern).
- PrintConfig.hpp/cpp: Register filament_prime_volume (per-filament EC prime
  volume, default 45mm³) matching BBS PrintConfig.
- Preset.cpp: Add filament_prime_volume to preset keys list.

Safe for non-carousel printers: group_id == extruder_id when each extruder
has one nozzle, so NozzleStatusRecorder behaves identically to the original
per-extruder tracking.

Reference to BBS: BambuStudio/src/libslic3r/Print.cpp _make_wipe_tower() L3341-3392

src/libslic3r/PrintConfig.hpp

@@ -1837,6 +1837,8 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     // BBS: wipe tower is only used for priming
     ((ConfigOptionFloat,              prime_volume))
     // Nozzle-change (nc) prime volume + pre-heat delta
+    // Reference to BBS: BambuStudio/src/libslic3r/PrintConfig.hpp L1524-1525
+    ((ConfigOptionFloats,             filament_prime_volume))
     ((ConfigOptionFloats,             filament_prime_volume_nc))
     ((ConfigOptionFloatsNullable,     filament_preheat_temperature_delta))
     ((ConfigOptionFloats,             flush_multiplier))