Add OTel middleware

### 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`

Start with the linked Taskiq OpenTelemetry middleware specification and inspect Silverback's dependency configuration and existing middleware entry points. Update the Taskiq dependency to >=0.12, implement the middleware described by the specification, and verify that the project's middleware behavior and tests cover the new integration.

Written by the indexing model from the issue text.