refactor: consolidate all migrations into single optimized migration file

- Replace 5 separate migration files with one consolidated migration
- Maintain all table structures, indexes, and foreign key constraints
- Improve package installation performance and maintainability
- Ensure proper table creation order for foreign key dependencies
- Include safe rollback functionality in reverse order

Author: nejc

database/migrations/2024_01_01_000000_create_platform_versions_table.php

@@ -0,0 +1,100 @@
+<?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
+    {
+        // Create platform_versions table
+        Schema::create('platform_versions', function (Blueprint $table) {
+            $table->id();
+            $table->string('version')->unique();
+            $table->string('title');
+            $table->text('description')->nullable();
+            $table->boolean('is_active')->default(true);
+            $table->timestamp('released_at')->nullable();
+            $table->json('metadata')->nullable();
+            $table->timestamps();
+            $table->softDeletes();
+
+            // Indexes for better performance
+            $table->index(['version']);
+            $table->index(['is_active']);
+            $table->index(['released_at']);
+            $table->index(['created_at']);
+        });
+
+        // Create whats_new table (without title column as per the simplification)
+        Schema::create('whats_new', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('platform_version_id')->constrained()->onDelete('cascade');
+            $table->text('content');
+            $table->enum('type', ['feature', 'improvement', 'bugfix', 'security', 'deprecation'])->default('feature');
+            $table->boolean('is_active')->default(true);
+            $table->integer('sort_order')->default(0);
+            $table->json('metadata')->nullable();
+            $table->timestamps();
+            $table->softDeletes();
+
+            // Indexes for better performance
+            $table->index(['platform_version_id']);
+            $table->index(['type']);
+            $table->index(['is_active']);
+            $table->index(['sort_order']);
+            $table->index(['created_at']);
+        });
+
+        // Create user_versions table
+        Schema::create('user_versions', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('user_id')->constrained()->onDelete('cascade');
+            $table->string('version')->default('1.0.0');
+            $table->string('last_seen_version')->nullable();
+            $table->timestamp('last_seen_at')->nullable();
+            $table->json('metadata')->nullable();
+            $table->timestamps();
+
+            // Indexes for better performance
+            $table->index(['user_id']);
+            $table->index(['version']);
+            $table->index(['last_seen_version']);
+            $table->index(['updated_at']);
+            
+            // Unique constraint to ensure one record per user
+            $table->unique(['user_id']);
+        });
+
+        // Add version column to users table
+        Schema::table('users', function (Blueprint $table) {
+            if (!Schema::hasColumn('users', 'version')) {
+                $table->string('version')->default('1.0.0')->after('is_read_news');
+                $table->index(['version']);
+            }
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // Remove version column from users table
+        Schema::table('users', function (Blueprint $table) {
+            if (Schema::hasColumn('users', 'version')) {
+                $table->dropIndex(['version']);
+                $table->dropColumn('version');
+            }
+        });
+
+        // Drop tables in reverse order (respecting foreign key constraints)
+        Schema::dropIfExists('user_versions');
+        Schema::dropIfExists('whats_new');
+        Schema::dropIfExists('platform_versions');
+    }
+};