chore: streamline namespacing

src/BusProNet/XmlParser/AgeConstraintParserRegistry.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace App\BusProNet\XmlParser;
 
 use App\BusProNet\Model\AgeConstraintResult;
+use App\BusProNet\XmlParser\Contract\AgeConstraintParserInterface;
 
 /**
  * Registry for managing and executing age constraint parsers.

src/BusProNet/XmlParser/BirthYearConstraintParser.php

@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace App\BusProNet\XmlParser;
 
 use App\BusProNet\Model\AgeConstraintResult;
+use App\BusProNet\XmlParser\Contract\AgeConstraintParserInterface;
 
 /**
  * Parser for birth year constraint data in JG:YYYY-YYYY format.

src/BusProNet/XmlParser/Contract/AgeConstraintParserInterface.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace App\BusProNet\XmlParser;
+namespace App\BusProNet\XmlParser\Contract;
 
 use App\BusProNet\Model\AgeConstraintResult;