Add support for SQL Server collation in flowforgePositionColumn macro and update README

Author: ManukMinasyan

README.md

@@ -62,7 +62,7 @@ php artisan flowforge:make-board TaskBoard --model=Task
 - **PHP:** 8.3+
 - **Laravel:** 11+  
 - **Filament:** 4.x
-- **Database:** MySQL, PostgreSQL, SQLite
+- **Database:** MySQL, PostgreSQL, SQLite, SQL Server, MariaDB
 
 ---
 
@@ -342,6 +342,19 @@ Schema::create('tasks', function (Blueprint $table) {
 $table->flowforgePositionColumn('sort_order');      // Creates 'sort_order' column instead
 ```
 
+### Database-Specific Collations
+
+The `flowforgePositionColumn()` method automatically applies the correct binary collation for each database:
+
+| Database | Collation | Purpose |
+|----------|-----------|---------|
+| **MySQL/MariaDB** | `utf8mb4_bin` | Binary comparison by character code values |
+| **PostgreSQL** | `C` | Binary byte comparison (POSIX locale) |
+| **SQL Server** | `Latin1_General_BIN2` | Unicode code-point comparison |
+| **SQLite** | None | Uses `BINARY` collation by default |
+
+These collations ensure consistent fractional ranking behavior across all database systems.
+
 ### Factory Integration
 
 <details>

src/FlowforgeServiceProvider.php

@@ -157,7 +157,8 @@ private function registerBlueprintMacros(): void
             return match ($driver) {
                 'pgsql' => $column->collation('C'),
                 'mysql' => $column->collation('utf8mb4_bin'),
-                default => $column,
+                'sqlsrv' => $column->collation('Latin1_General_BIN2'),
+                default => $column,  // No collation needed - BINARY by default, e.g. SQLite
             };
         });
     }

tests/Feature/BlueprintMacroTest.php

@@ -48,17 +48,47 @@
         ->and($column->get('collation'))->toBe('utf8mb4_bin');
 });
 
+test('flowforgePositionColumn macro creates position column with correct collation for SQL Server', function () {
+    // Mock SQL Server connection
+    DB::shouldReceive('connection->getDriverName')
+        ->once()
+        ->andReturn('sqlsrv');
+
+    $blueprint = new Blueprint('test_table');
+    $column = $blueprint->flowforgePositionColumn();
+
+    expect($column)->toBeInstanceOf(ColumnDefinition::class)
+        ->and($column->get('type'))->toBe('string')
+        ->and($column->get('nullable'))->toBeTrue()
+        ->and($column->get('collation'))->toBe('Latin1_General_BIN2');
+});
+
+test('flowforgePositionColumn macro works with SQLite (no collation needed)', function () {
+    // Mock SQLite connection
+    DB::shouldReceive('connection->getDriverName')
+        ->once()
+        ->andReturn('sqlite');
+
+    $blueprint = new Blueprint('test_table');
+    $column = $blueprint->flowforgePositionColumn();
+
+    expect($column)->toBeInstanceOf(ColumnDefinition::class)
+        ->and($column->get('type'))->toBe('string')
+        ->and($column->get('nullable'))->toBeTrue()
+        ->and($column->get('collation'))->toBeNull(); // SQLite uses BINARY by default
+});
+
 test('flowforgePositionColumn macro works with unsupported database driver', function () {
     // Mock unsupported driver
     DB::shouldReceive('connection->getDriverName')
         ->once()
-        ->andReturn('sqlite');
+        ->andReturn('unknown_driver');
 
     $blueprint = new Blueprint('test_table');
     $column = $blueprint->flowforgePositionColumn();
 
     expect($column)->toBeInstanceOf(ColumnDefinition::class)
         ->and($column->get('type'))->toBe('string')
         ->and($column->get('nullable'))->toBeTrue()
-        ->and($column->get('collation'))->toBeNull();
+        ->and($column->get('collation'))->toBeNull(); // Graceful fallback
 });