feat(event): add address relationship and migration for event locations

database/migrations/2026_09_30_000200_add_address_id_to_events.php

@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('events', function (Blueprint $table): void {
+            $table->foreignId('address_id')->nullable()->constrained('addresses')->nullOnDelete();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('events', function (Blueprint $table): void {
+            $table->dropConstrainedForeignId('address_id');
+        });
+    }
+};

database/migrations/2026_09_30_000300_copy_event_locations_to_addresses.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        DB::transaction(function (): void {
+            DB::table('events')->whereNull('address_id')->orderBy('id')->lockForUpdate()
+                ->chunkById(100, function ($events): void {
+                    foreach ($events as $event) {
+                        $coordinates = $event->exact_location === null
+                            ? null
+                            : json_decode($event->exact_location, true, flags: JSON_THROW_ON_ERROR);
+
+                        if ($coordinates !== null && (! is_array($coordinates)
+                            || ! is_numeric($coordinates['latitude'] ?? null)
+                            || ! is_numeric($coordinates['longitude'] ?? null)
+                            || ! is_finite((float) $coordinates['latitude'])
+                            || ! is_finite((float) $coordinates['longitude'])
+                            || abs((float) $coordinates['latitude']) > 90
+                            || abs((float) $coordinates['longitude']) > 180)) {
+                            throw new RuntimeException("Invalid location coordinates for event {$event->id}");
+                        }
+
+                        if ($event->location === null || trim($event->location) === '') {
+                            if ($coordinates !== null) {
+                                throw new RuntimeException("Missing address text for event {$event->id}");
+                            }
+
+                            continue;
+                        }
+
+                        $now = now();
+                        $addressId = DB::table('addresses')->insertGetId([
+                            'label' => 'Ubicación del evento',
+                            'address_text' => $event->location,
+                            'latitude' => $coordinates === null ? null : $coordinates['latitude'],
+                            'longitude' => $coordinates === null ? null : $coordinates['longitude'],
+                            'created_at' => $now,
+                            'updated_at' => $now,
+                        ]);
+
+                        // Update only the new link, preserving the original fields and timestamps.
+                        DB::table('events')->where('id', $event->id)->update(['address_id' => $addressId]);
+                    }
+                });
+        });
+    }
+
+    public function down(): void
+    {
+        // Copies may already have been edited or shared; keep them and the legacy data.
+    }
+};