Fix: Allow lazy ghosts for services without constructor arguments

[mildabre]

Fix: Allow lazy ghosts for services without constructor arguments

Problem

Currently, ServiceDefinition::canBeLazy() prevents lazy ghost creation for services without constructor arguments:

&& ($this->creator->arguments || $this->setup)

This check causes the lazy flag to be silently ignored for such services, which is incorrect behavior.

Use Case

Services with heavy initialization that doesn't require dependencies:

class ConfigParser {
    public function __construct() {
        // Heavy work without dependencies
        $this->parseYamlFile();  // 200ms
        $this->validateSchema(); // 150ms
    }
}

// Currently: lazy flag ignored, always eager initialization
$def->setLazy(true);  // Has no effect! ❌

// After fix: lazy flag respected
$def->setLazy(true);  // Creates lazy ghost ✅

Solution

Remove the constructor arguments/setup check as it's no longer necessary with PHP 8.4's native ReflectionClass::newLazyGhost() support.

The remaining checks are still valid:

• Entity must be a string (class name)
• Class must not be internal (PHP limitation)

Backward Compatibility

✅ NOT a BC break - only fixes previously broken functionality
✅ All existing lazy services continue to work
✅ Enables new valid use cases

Suggested Release

Patch version (v3.3.x) as this is a bug fix, not a feature.