Replace queue role proxies with native debug middleware

[viktorprogger]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	✔️
Tests pass?	✔️

Summary

• Replace producer, consumer, and worker debug proxies with native Push and Worker middleware.
• Add immutable queue-aware Push requests and a separate producer-status capability/provider.
• Remove the legacy role interfaces and update retry contracts, DI, documentation, and tests.

External broker/provider effects were not exercised locally.

[codecov]

Codecov Report

❌ Patch coverage is 96.59091% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.75%. Comparing base (63d7524) to head (0ef01a1).

Files with missing lines	Patch %	Lines
src/Middleware/Worker/WorkerFinalHandler.php	76.92%	6 Missing ⚠️
src/Debug/Middleware/PushDebugMiddleware.php	96.87%	1 Missing ⚠️
src/Middleware/Worker/WorkerMiddlewareFactory.php	95.23%	1 Missing ⚠️
src/Worker/Worker.php	96.77%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #335      +/-   ##
============================================
+ Coverage     92.51%   94.75%   +2.24%     
- Complexity      383      437      +54     
============================================
  Files            59       67       +8     
  Lines          1015     1163     +148     
============================================
+ Hits            939     1102     +163     
+ Misses           76       61      -15     

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