fix(schema): drop SQLite Feature\ForeignKeys (ALTER FK not supported)

The shared Schema\Trait\ForeignKeys emits ALTER TABLE ADD CONSTRAINT
and ALTER TABLE DROP FOREIGN KEY — neither is valid SQLite. Schema\SQLite
should not implement Feature\ForeignKeys; users that need foreign keys
on SQLite declare them inline at CREATE TABLE time via the Table-level
\$table->foreignKey() helper, which Table\SQLite still supports.

Removes the schema-level addForeignKey/dropForeignKey from SQLite and
the corresponding tests that asserted invalid SQLite DDL.

Author: abnegate

src/Query/Schema/SQLite.php

@@ -4,12 +4,10 @@
 
 use Utopia\Query\Builder\Statement;
 use Utopia\Query\Exception\UnsupportedException;
-use Utopia\Query\Schema\Feature\ForeignKeys;
 use Utopia\Query\Schema\Feature\Views;
 
-class SQLite extends SQL implements ForeignKeys, Views
+class SQLite extends SQL implements Views
 {
-    use Trait\ForeignKeys;
     use Trait\Views;
 
     #[\Override]

tests/Query/Schema/SQLiteTest.php

@@ -9,19 +9,13 @@
 use Utopia\Query\Exception\ValidationException;
 use Utopia\Query\Query;
 use Utopia\Query\Schema\ColumnType;
-use Utopia\Query\Schema\Feature\ForeignKeys;
 use Utopia\Query\Schema\ForeignKeyAction;
 use Utopia\Query\Schema\SQLite as Schema;
 
 class SQLiteTest extends TestCase
 {
     use AssertsBindingCount;
 
-    public function testImplementsForeignKeys(): void
-    {
-        $this->assertInstanceOf(ForeignKeys::class, new Schema());
-    }
-
     public function testCreateTableBasic(): void
     {
         $schema = new Schema();
@@ -355,45 +349,6 @@ public function testDropView(): void
         $this->assertSame('DROP VIEW `active_users`', $result->query);
     }
 
-    public function testAddForeignKeyStandalone(): void
-    {
-        $schema = new Schema();
-        $result = $schema->addForeignKey(
-            'orders',
-            'fk_user',
-            'user_id',
-            'users',
-            'id',
-            onDelete: ForeignKeyAction::Cascade,
-            onUpdate: ForeignKeyAction::SetNull
-        );
-
-        $this->assertSame(
-            'ALTER TABLE `orders` ADD CONSTRAINT `fk_user` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE ON UPDATE SET NULL',
-            $result->query
-        );
-    }
-
-    public function testAddForeignKeyNoActions(): void
-    {
-        $schema = new Schema();
-        $result = $schema->addForeignKey('orders', 'fk_user', 'user_id', 'users', 'id');
-
-        $this->assertStringNotContainsString('ON DELETE', $result->query);
-        $this->assertStringNotContainsString('ON UPDATE', $result->query);
-    }
-
-    public function testDropForeignKeyStandalone(): void
-    {
-        $schema = new Schema();
-        $result = $schema->dropForeignKey('orders', 'fk_user');
-
-        $this->assertSame(
-            'ALTER TABLE `orders` DROP FOREIGN KEY `fk_user`',
-            $result->query
-        );
-    }
-
     public function testCreateTableWithMultiplePrimaryKeys(): void
     {
         $schema = new Schema();