Add auto ID enum, modify insert queries

tests/unit/ConfigurationTest.php

@@ -2,7 +2,7 @@
 
 namespace Test\Unit;
 
-use BitBadger\PDODocument\{Configuration, DocumentException};
+use BitBadger\PDODocument\{AutoId, Configuration, DocumentException};
 use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
 
@@ -29,6 +29,18 @@ class ConfigurationTest extends TestCase
         }
     }
 
+    #[TestDox('Auto ID default succeeds')]
+    public function testAutoIdDefaultSucceeds(): void
+    {
+        $this->assertEquals(AutoId::None, Configuration::$autoId, 'Auto ID should default to None');
+    }
+
+    #[TestDox('ID string length default succeeds')]
+    public function testIdStringLengthDefaultSucceeds(): void
+    {
+        $this->assertEquals(16, Configuration::$idStringLength, 'ID string length should default to 16');
+    }
+
     #[TestDox("Db conn fails when no DSN specified")]
     public function testDbConnFailsWhenNoDSNSpecified(): void
     {