chore(fusion_plating_shopfloor): bump 19.0.30.0.0 for Phase 6.1 — PIN backend

Backend foundation for the tablet PIN gate:
- res.users PIN fields + hash helpers (PBKDF2-SHA256, 200k iter, salted)
- 5 endpoints: /fp/tablet/{tiles,unlock,set_pin,reset_pin_for,ping}
- Per-user lockout (5 fails → 5 min, both configurable)
- Station roster + per-station idle override
- ir.config_parameter defaults
- Preferences Set/Change PIN button + Manager Reset button

Phase 6.2 (frontend lock screen) is next.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_shopfloor/__manifest__.py

@@ -5,7 +5,7 @@
 
 {
     'name': 'Fusion Plating — Shop Floor',
-    'version': '19.0.29.0.0',
+    'version': '19.0.30.0.0',
     'category': 'Manufacturing/Plating',
     'summary': 'Shop-floor tablet stations, QR scanning, bake window enforcer, '
                'first-piece inspection gates.',