Finish tests

- Add sub-doc handling for SQLite fields
- Add casting for PostgreSQL BT on numeric value
- Add hasItems() to DocumentList
- Fix SQL syntax problems exposed by tests

tests/integration/sqlite/DocumentTest.php

@@ -3,12 +3,14 @@
 namespace Test\Integration\SQLite;
 
 use BitBadger\PDODocument\{Document, DocumentException, Find};
+use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
 use Test\Integration\{SubDocument, TestDocument};
 
 /**
  * SQLite integration tests for the Document class
  */
+#[TestDox('Document (SQLite integration)')]
 class DocumentTest extends TestCase
 {
     /** @var string Database name for throwaway database */