OPCIÓN C + A1: Consolidación técnica + orjson

C1: Materialized view part_vehicle_preview (creación en progreso)
- Migración v3.3_materialized_view.sql
- catalog_service.py y dashboard/server.py ahora usan la MV
- Script refresh_part_vehicle_preview.py + warm_vehicle_cache.py actualizado

C2: Fix cache warming script (autónomo)
- Auto-re-ejecuta con sudo -u postgres si peer auth falla
- Args CLI: --dsn, --batch-size, --ttl, --dry-run

C3: CSS dinámico residual extraído
- sidebar.js → sidebar.css (nuevo)
- pos-utils.js → common.css (nuevo)
- Links agregados a 14 templates POS

C4: Script de load testing básico
- scripts/load_test.py: métricas p50/p95/p99, throughput, errores

C5: Documentación actualizada
- FASES_IMPLEMENTADAS.md: test count real, FASE 7 completa
- performance_audit_2026.md: anexo post-FASE 7, métricas actualizadas

A1: Serialización orjson
- pos/json_provider.py: DefaultJSONProvider con orjson.dumps/loads
- Aplicado a POS app y Dashboard server
- Fix indentation error en pos_bp.py

Tests: 73/73 pasando

pos/blueprints/pos_bp.py

@@ -438,16 +438,16 @@ def create_quotation():
     valid_days = int(data.get('valid_days', 7))
     valid_until = (date.today() + timedelta(days=valid_days)).isoformat()
 
-        # Multi-currency for quotations
-        from services.currency import get_exchange_rate
-        currency = data.get('currency', 'MXN')
-        if currency not in ('MXN', 'USD'):
-            cur.close(); conn.close()
-            return jsonify({'error': f'Unsupported currency: {currency}'}), 400
-        exchange_rate = data.get('exchange_rate')
-        if currency != 'MXN' and exchange_rate is None:
-            exchange_rate = float(get_exchange_rate(conn, currency, 'MXN'))
-        exchange_rate = float(exchange_rate) if exchange_rate else 1.0
+    # Multi-currency for quotations
+    from services.currency import get_exchange_rate
+    currency = data.get('currency', 'MXN')
+    if currency not in ('MXN', 'USD'):
+        cur.close(); conn.close()
+        return jsonify({'error': f'Unsupported currency: {currency}'}), 400
+    exchange_rate = data.get('exchange_rate')
+    if currency != 'MXN' and exchange_rate is None:
+        exchange_rate = float(get_exchange_rate(conn, currency, 'MXN'))
+    exchange_rate = float(exchange_rate) if exchange_rate else 1.0
 
     try:
         cur.execute("""