Add Routing module: EvRoute, pricing, time slots, read API, caching (T3.1-T3.7)

Implements Phase 3 in full: EvRoute model with company/destination relations
and a from/to-must-differ guard; the ev_route_time_slots pivot; RoutePricing
with a per-route is_blocked flag (every route auto-manages exactly one price
row per vehicle option via a fixed-row Filament repeater on both create and
edit); PricingService::quote() with a shared VehicleOption enum; RoutingPlugin
with the EvRouteResource admin UI (activation gated on non-blocked options
being priced); the /api/v1/routes read API (list/show/pricing/time-slots,
AI-agent-friendly nested shape); and Redis-tag-based response caching
invalidated via EvRoute/RoutePricing observers.

app-modules/catalog/src/Models/DepartureTimeSlot.php

@@ -4,7 +4,9 @@ namespace Modules\Catalog\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Modules\Catalog\Database\Factories\DepartureTimeSlotFactory;
+use Modules\Routing\Models\EvRoute;
 
 /**
  * A shared catalog of departure times, attached to routes via a pivot in the
@@ -34,4 +36,11 @@ class DepartureTimeSlot extends Model
             'is_active' => 'boolean',
         ];
     }
+
+    public function routes(): BelongsToMany
+    {
+        return $this->belongsToMany(EvRoute::class, 'ev_route_time_slots')
+            ->withPivot('is_active')
+            ->withTimestamps();
+    }
 }