fix: TaskiqAdminMiddleware doesn't work with dataclasses

[danfimov]

No description provided.

[Copilot]

Pull request overview

This PR fixes a bug where TaskiqAdminMiddleware was failing when task arguments contained dataclasses or other non-pydantic types. The fix converts TaskiqMessage and TaskiqResult objects to dictionaries using model_dump() before extracting fields for JSON serialization, ensuring proper serialization of nested objects.

Key changes:

• Modified TaskiqAdminMiddleware to use model_dump() on message and result objects before accessing their fields
• Updated taskiq/compat.py to modernize type hints and fix a condition ordering issue
• Replaced the old admin middleware test file with a new comprehensive test suite that verifies serialization of dataclasses, TypedDicts, and Pydantic models

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
taskiq/middlewares/taskiq_admin_middleware.py	Fixed serialization by converting messages/results to dicts before field access
taskiq/compat.py	Modernized type hints and fixed version comparison condition
tests/middlewares/test_taskiq_admin_middleware.py	Removed old test file
tests/middlewares/admin_middleware/test_arguments_formatting.py	Added new parameterized tests for different DTO types
tests/middlewares/admin_middleware/dto.py	Added test DTOs (dataclass, TypedDict, Pydantic)
tests/middlewares/admin_middleware/conftest.py	Added test fixtures for mock admin server and broker setup
pyproject.toml	Added polyfactory dependency for test data generation
uv.lock	Updated lock file with new dependencies

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