Add OTel middleware

[fubuloubu]

Overview

OTel is a long-requested add to Silverback

Specification

https://taskiq-python.github.io/available-components/middlewares.html#opentelemetry-middleware

Dependencies

Update dep of Taskiq to >=0.12

[linear]

SBK-691

[fubuloubu]

Saw that TaskIQ added it, and I tested it w/ Logfire, however we could better intrument our apps so that we would get more user-focused spans in place (around the handler execution)

Additionally, we can explore how to do metrics exporting (which TaskIQ doesn't do afaict)

[fubuloubu]

https://logfire.pydantic.dev/docs/integrations/#creating-custom-integrations