feat: support modern-di 4

[lesnik512]

Refs modern-python/modern-di#579.

Summary

• Widen the requirement to modern-di>=3,<5.
• docs/adr/0002-only-worker-lifecycle-is-wired.md: the last sentence cited ContainerClosedWarning, which 4.0 removes. It now says that from 4.0 a resolve from a closed container raises ContainerClosedError, so the unconditional container.open() on worker startup is what keeps the second worker cycle working.
• tests/dependencies.py: fetch_task_name took message: TaskiqMessage | None = None. Tests only resolve it inside a task, where taskiq_message_provider has a value, and in 4.0 a registered ContextProvider with no value raises regardless of the creator default. The parameter is now required.

Verification

• 3.x (modern-di 3.6.0 from PyPI): eof-fixer, ruff format/check and ty pass; pytest 10 passed, coverage 100%.
• 4.0 (modern-di main f300c2e from a local wheel): ty passes; pytest 10 passed, coverage 100%.

This PR stays a draft until modern-di 4.0.0 is on PyPI.