refactor: Fix psalm issues

- Add typing for most of the services, controllers and mappers
- Add api doc for mappers
- Use vendor-bin for psalm
- Use attributes for controllers
- Fix upload of attachments

Signed-off-by: Carl Schwan <carl.schwan@nextcloud.com>

tests/unit/Db/CardTest.php

@@ -81,8 +81,8 @@ class CardTest extends TestCase {
 			'duedate' => null,
 			'overdue' => 0,
 			'archived' => false,
-			'attachments' => null,
-			'attachmentCount' => null,
+			'attachments' => [],
+			'attachmentCount' => 0,
 			'assignedUsers' => null,
 			'deletedAt' => 0,
 			'commentsUnread' => 0,
@@ -110,8 +110,8 @@ class CardTest extends TestCase {
 			'duedate' => null,
 			'overdue' => 0,
 			'archived' => false,
-			'attachments' => null,
-			'attachmentCount' => null,
+			'attachments' => [],
+			'attachmentCount' => 0,
 			'assignedUsers' => null,
 			'deletedAt' => 0,
 			'commentsUnread' => 0,
@@ -141,8 +141,8 @@ class CardTest extends TestCase {
 			'duedate' => null,
 			'overdue' => 0,
 			'archived' => false,
-			'attachments' => null,
-			'attachmentCount' => null,
+			'attachments' => [],
+			'attachmentCount' => 0,
 			'assignedUsers' => ['user1'],
 			'deletedAt' => 0,
 			'commentsUnread' => 0,