Raise without argument, reraise the current exception

[remimd]

…ception

[Copilot]

Pull Request Overview

This PR standardizes exception re-raising to preserve original tracebacks, streamlines DI registrations in the core message module, and bumps the UV setup action version.

• Replace raise exc with bare raise in history and retry middlewares.
• Simplify @injection.singleton calls by removing explicit targets and generic parameters in cq/_core/message.py.
• Upgrade astral-sh/setup-uv action to v6 in CI.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

File	Description
tests/helpers/history.py	Switched from raise exc to bare raise to keep full traceback.
cq/middlewares/retry.py	Removed capturing exception variable and use bare raise.
cq/_core/message.py	Consolidated @injection.singleton calls, removed generics/on=.
.github/actions/environment/action.yml	Updated astral-sh/setup-uv action version to v6.

Comments suppressed due to low confidence (2)

cq/_core/message.py:36

• Removing the explicit on=CommandBus parameter might alter the intended injection key; consider adding on=CommandBus to ensure the bus is registered correctly.

@injection.singleton(inject=False, mode="fallback")

cq/_core/message.py:48

• Without on=QueryBus, the decorator may not register to the correct injection target; please specify on=QueryBus to maintain consistency.

@injection.singleton(inject=False, mode="fallback")