fix: limit-aware inventory creation

[etiennecollin]

Description

This draft PR is a proof of concept for #1756.

The current issue is that --limit <group> still allows host data from non-selected groups to be merged during inventory construction. If the same host exists in multiple groups with overlapping keys, values from later groups overwrite those from the selected group.

This implementation explores passing the limit iterable into the Inventory object so that host data from non-selected groups can be ignored during inventory construction.

The goal here is mainly to validate the approach; I do not expect this implementation to be merged as-is, since it was written fairly quickly and may not align with the intended architecture of the project. It may serve as inspiration for a proper implementation.

Testing

The included tests pass with scripts/dev-test.sh, but I encountered the following error in one of my real deployments, which does not occur on pyinfra v3.8.0. So there is likely at least one edge case or unintended side effect in the current implementation. The error also happens on 3.8.0, so it might be my deployment that is flawed.

--> pyinfra error: Cycle detected in operation ordering DAG.
    Error: ('nodes are in a cycle', ['6122ecd5c8bf5453cf3cefd3b6786f892d5d01af', 'af7a299a1fa7001b19dc57f7f9a1249385411c40-0', 'b2c4a8bab430d883f638396faaf8251b721a058d-0', '0ae435d43f8108d80868fdf5c2a700ed581f139f-0', 'eccb013008ef20c412778a9b62f4dfbf3d7013f2-0', 'accace0f63f34b5b36b28d67ad44597a71d21803', '6122ecd5c8bf5453cf3cefd3b6786f892d5d01af'])

    This can happen when using loops in operation code, please see: https://docs.pyinfra.com/en/latest/deploy-process.html#loops-cycle-errors

Checklist

• Pull request is based on the default branch (3.x at this time)
• Pull request includes tests for any new/updated operations/facts
• Pull request includes documentation for any new/updated operations/facts
• Tests pass (see scripts/dev-test.sh)
• Type checking & code style passes (see scripts/dev-lint.sh)
• Pull request title follows the conventional commits format