Upgrade Clock library to 5.0 leveraging mostly Symfony

[dbellettini]

• Switching from Recruiter Clock to Symfony Clock
• Leverage Sleep feature from Symfony's interface

[Copilot]

Pull Request Overview

This PR upgrades the Clock library to version 5.0, transitioning from the custom Recruiter Clock implementation to Symfony's Clock component. The key changes include replacing clock method calls from current() to now(), utilizing Symfony's sleep functionality, and updating DateTime handling to use immutable objects.

• Migrated from Recruiter\Clock to Symfony\Component\Clock\ClockInterface
• Replaced current() method calls with now() to match Symfony Clock API
• Updated sleep functionality to use clock-based sleep instead of external callback

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
composer.json	Updates recruiterphp/clock dependency from ^4.1 to ^5.0
src/Recruiter/Concurrency/PeriodicalCheck.php	Migrates to Symfony ClockInterface and updates method calls
src/Recruiter/Concurrency/MongoLock.php	Refactors to use Symfony Clock with improved constructor and sleep handling
tests/Recruiter/Concurrency/PeriodicalCheckTest.php	Updates test to use MockClock and sleep method
tests/Recruiter/Concurrency/MongoLockTest.php	Comprehensive test updates for new clock interface and verification patterns