chore: Add tests that reproduce key parsing bugs

[allenporter]

Add tests for #630. I first wrote the tests and made sure they failed without that PR, then confirm they pass with those changes.

The testing approach is:
(1) Have a test with a generic data type reproducing the issue
(2) Test the caching library with the specific objects causing the problem

[Copilot]

Pull request overview

This PR adds comprehensive tests to verify fixes for key parsing bugs reported in issue #630. The tests ensure that dictionaries with integer keys are properly serialized and deserialized, both in generic data structures and in the caching library's specific objects.

• Added nested_int_dict field to test objects to validate integer key handling
• Created parametrized test to verify both integer and string-integer key parsing
• Extended cache tests to include CombinedMapInfo with integer keys for real-world validation

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
tests/test_containers.py	Adds nested_int_dict field to ComplexObject and creates parametrized test to verify integer key parsing works with both int and string representations
tests/devices/test_file_cache.py	Extends cache test data to include home_map_info with integer keys, testing real-world objects (CombinedMapInfo, NamedRoomMapping)
tests/devices/snapshots/test_file_cache.ambr	Updates test snapshots to reflect the new home_map_info data in cache test cases

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[Lash-L]

Oh gotta fix long before this one is merged

[allenporter]

Oh gotta fix long before this one is merged

referring to lint errors here?

[Lash-L]

Oh gotta fix long before this one is merged

referring to lint errors here?

Yes sorry - mobile autocorrect