fix(cmd): enable mypy strict checking for cloudinit.cmd

[jaborvs]

Partially-fixes: GH-5445

As part of my onboarding, I fixed the untyped defs errors found the following files:

• cloudinit.cmd.devel.make_mime
• cloudinit.cmd.devel.net_convert
• cloudinit.cmd.main

Proposed Commit Message

fix(typing): Enable mypy strict checking for cloudinit.cmd

Remove cloudinit.cmd.main, cloudinit.cmd.devel.net_convert and
cloudinit.cmd.devel.make_mime from the check_untyped_defs=false
override list in pyproject.toml and resolve all mypy errors for
each module.

Partially-fixes: GH-5445

Additional Context

N/A

Test Steps

N/A

Merge type

• Squash merge using "Proposed Commit Message"
• Rebase and merge unique commits. Requires commit messages per-commit each referencing the pull request number (#<PR_NUM>)

[jaborvs]

There is an extra commit I will remove once the review is completed. This is to fix the error in the "Unit: Alternate Distros / build (pull_request)" job, which fails if the package py3-python-discovery is not installed in the install dependencies step. There is an open PR which implements this fix, pending to be approved and merged (see PR-6864)

[holmanb]

Thanks for this. I left some feedback.

[blackboxsw]

A couple of minor thoughts here. Thanks a log @jaborvs for the help.

[jaborvs]

@blackboxsw i have reviewed all the comments and implemented the suggested fixes! let me know if there is anything else you would like me to fix before proceeding with the merge.
i have left all the comments unresolved so that you can review the code and then mark them as resolved if the fixes are correct :)
thanks a lot for alll the feedback!

[Copilot]

Pull request overview

This PR advances GH-5445 by enabling stricter mypy checking for cloudinit.cmd modules, removing them from the check_untyped_defs=false override list and applying targeted typing/logic adjustments to satisfy strict type checking.

Changes:

• Removed cloudinit.cmd.devel.make_mime, cloudinit.cmd.devel.net_convert, and cloudinit.cmd.main from mypy overrides disabling check_untyped_defs.
• Added/adjusted type annotations and small control-flow tweaks in cloudinit.cmd.main and related modules to satisfy mypy strictness.
• Tightened type hints for datasource fetching and renderer configuration inputs.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
pyproject.toml	Removes mypy override exemptions so cmd modules are checked with check_untyped_defs=true.
cloudinit/stages.py	Adds a concrete return type for Init.fetch and clarifies its docstring.
cloudinit/net/eni.py	Broadens renderer config typing to Mapping[str, Any] for stricter typing compatibility.
cloudinit/cmd/main.py	Updates CLI error handling, status typing, log exporter selection, and hostname handler call args for mypy strictness.
cloudinit/cmd/devel/net_convert.py	Minor typing-related cleanup (import/use) to satisfy mypy for renderer typing.
cloudinit/cmd/devel/make_mime.py	Minor refactor of warning string assembly/variable naming.

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[Copilot]

Pull request overview

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

[blackboxsw]

All looks good @jaborvs with the exception of adding that !r per copilot suggestion. Thanks for this we'll get things landed when that's in place.

[jaborvs]

All changes are ready! Thank you very much for all the feedback :)