feat: add stations and station prices migrations

Creates stations, station_prices_current, station_prices (monthly-partitioned), and station_prices_archive tables.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

database/migrations/2026_04_03_172840_create_stations_table.php

@@ -0,0 +1,48 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('stations', function (Blueprint $table): void {
+            $table->string('node_id', 64)->primary();
+            $table->string('trading_name', 128);
+            $table->string('brand_name', 64)->nullable();
+            $table->boolean('is_same_trading_and_brand')->default(false);
+            $table->boolean('is_supermarket')->default(false)->comment('Set by StationTaggingService');
+            $table->boolean('is_motorway_service_station')->default(false);
+            $table->boolean('is_supermarket_service_station')->default(false);
+            $table->boolean('temporary_closure')->default(false);
+            $table->boolean('permanent_closure')->default(false);
+            $table->date('permanent_closure_date')->nullable();
+            $table->string('public_phone_number', 20)->nullable();
+            $table->string('address_line_1', 255)->nullable();
+            $table->string('address_line_2', 255)->nullable();
+            $table->string('city', 100)->nullable();
+            $table->string('county', 100)->nullable();
+            $table->string('country', 64)->nullable();
+            $table->string('postcode', 10);
+            $table->decimal('lat', 10, 7);
+            $table->decimal('lng', 10, 7);
+            $table->json('amenities')->nullable();
+            $table->json('opening_times')->nullable();
+            $table->json('fuel_types')->nullable();
+            $table->dateTime('last_seen_at');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('stations');
+    }
+};