Add Queue.Job.* lifecycle events with optional Sentry bridge

[dereuromark]

Summary

This PR adds generic queue job lifecycle events with an optional bridge for Sentry integration. This is an alternative to PRs #449 and #452, providing a middle-ground approach.

Generic Events

The plugin now dispatches standard lifecycle events:

• Queue.Job.created - when a job is added to the queue
• Queue.Job.started - when a worker begins processing a job
• Queue.Job.completed - when a job finishes successfully
• Queue.Job.failed - when a job fails (with exception data)

These events are useful for any monitoring, logging, or external integration.

Optional Sentry Integration

For lordsimal/cakephp-sentry integration, users can register the included CakeSentryEventBridge:

// In Application::bootstrap()
use Cake\Event\EventManager;
use Queue\Event\CakeSentryEventBridge;

EventManager::instance()->on(new CakeSentryEventBridge());

This bridges the generic events to CakeSentry.Queue.* events that the Sentry plugin listens to.

Key Benefits

Approach	Description
Generic events	Useful for any monitoring tool, not just Sentry
Optional bridge	Users opt-in to Sentry integration by registering the bridge
No Sentry dependency	Queue plugin has no dependency on Sentry SDK
Compatible with cakephp-sentry PR #43	The bridge dispatches events in the format expected by the Sentry plugin

Related Issues

• Missing Sentry features LordSimal/cakephp-sentry#17
• add generic queue tracing feature LordSimal/cakephp-sentry#43
• Alternative to Add queue job lifecycle events for monitoring integration #449 and Add CakeSentry.Queue.* events for Sentry integration #452

Test plan

• Test for Queue.Job.created event
• Test for Queue.Job.started event
• Test for Queue.Job.completed event
• Test for Queue.Job.failed event
• Tests for CakeSentryEventBridge listener
• All 137 tests pass
• Documentation updated

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 97.14286% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.91%. Comparing base (e447805) to head (2487bfd).

Files with missing lines	Patch %	Lines
src/Event/CakeSentryEventBridge.php	96.00%	2 Missing ⚠️
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Additional details and impacted files

@@             Coverage Diff              @@
##             master     #453      +/-   ##
============================================
+ Coverage     73.28%   73.91%   +0.63%     
- Complexity      777      786       +9     
============================================
  Files            41       42       +1     
  Lines          2691     2760      +69     
============================================
+ Hits           1972     2040      +68     
- Misses          719      720       +1     

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