Fixed prometheus multiprocessing registry

[FadingFog]

Replaces global prometheus REGISTRY with a new CollectorRegistry

[codecov]

Codecov Report

❌ Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.79%. Comparing base (3f1d0d1) to head (7e30af2).

Files with missing lines	Patch %	Lines
taskiq/middlewares/prometheus_middleware.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #620      +/-   ##
==========================================
- Coverage   79.82%   79.79%   -0.04%     
==========================================
  Files          69       69              
  Lines        2528     2529       +1     
==========================================
  Hits         2018     2018              
- Misses        510      511       +1     

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[s3rius]

First off, can you please run uv run pre-commit run -a to fix errors.

And, second thing. Can you please tell me how to run it properly? Because right now with the following code:

from taskiq_redis import ListQueueBroker

from taskiq.middlewares import PrometheusMiddleware

broker = ListQueueBroker("redis://localhost").with_middlewares(PrometheusMiddleware())

If you run it with

taskiq worker a:broker

Then localhost:9000 returns empty page.

[FadingFog]

First off, can you please run uv run pre-commit run -a to fix errors.

Fixed

Then localhost:9000 returns empty page.

It's happening because we create a new registry that doesn't have default python metrics, so there're no metrics at the time of worker startup. You can execute a task and then the metrics will be populated