feat(system): add typed show_components columns

[pesap]

Closes #159

Summary

• Draft PR: not ready to merge until validation and review are complete.
• Adds public ComponentColumn[T] support for computed System.show_components() columns.
• Allows show_components() to render selected component fields from a bare string, tuple, or list.
• Adds filter_func support and clear ISInvalidParameter errors for invalid fields and failed computed-column extractors.
• Keeps display/table-rendering support in system_info.py, with System.show_components() as a thin public API wrapper.

Acceptance criteria

• Existing supported calls continue to work: show_components(ComponentType), show_components(ComponentType, show_uuid=True), show_components(ComponentType, show_time_series=True), and show_components(ComponentType, show_supplemental=True).
  • Evidence: test_system_show_components covers the existing call shapes.
• show_components(ComponentType, "field_name") renders that component field as one additional column.
  • Evidence: test_system_show_components_with_component_fields covers bare string input.
• show_components(ComponentType, ("field_a", "field_b")) renders multiple additional columns.
  • Evidence: test_system_show_components_with_component_fields covers tuple input.
• show_components(ComponentType, ["field_a", "field_b"]) renders multiple additional columns.
  • Evidence: test_system_show_components_with_component_fields covers list input.
• A typed ComponentColumn[T] or equivalent supports computed columns with callable extractors.
  • Evidence: test_system_show_components_with_computed_column covers ComponentColumn[SimpleBus].
• filter_func is accepted and applied to the same selected component subtype as component_type.
  • Evidence: test_system_show_components_with_filter_func filters SimpleBus rows.
• Invalid field names raise a clear infrasys exception that identifies the missing column and component involved.
  • Evidence: test_system_show_components_invalid_field_name asserts ISInvalidParameter mentions the field and SimpleBus.
• Failing computed-column extractors raise a clear infrasys exception that identifies the failing column and component involved.
  • Evidence: test_system_show_components_computed_column_failure asserts ISInvalidParameter mentions the column and component label.
• Bare strings are treated as one column name, not as an iterable of characters.
  • Evidence: bare string "voltage" renders successfully as a field column.
• Legacy keyword metadata toggles remain keyword-compatible.
  • Evidence: metadata keyword toggles are preserved and covered with/without selected columns.

Deviations from the original plan

• uv run mypy src tests still reports unrelated pre-existing errors in supplemental attribute code/tests; touched files pass uv run mypy src/infrasys/system.py src/infrasys/system_info.py tests/test_system.py.

Testing Strategy

uv run pytest tests/test_system.py -k 'show_components or system_info'
uv run ruff check src tests
uv run ruff format src tests --check
uv run mypy src/infrasys/system.py src/infrasys/system_info.py tests/test_system.py
uv run mypy src tests

References

• Add typed column support to System.show_components #159

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.94%. Comparing base (e3979f2) to head (cba3bc1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #160      +/-   ##
==========================================
+ Coverage   94.82%   94.94%   +0.11%     
==========================================
  Files          61       62       +1     
  Lines        6072     6176     +104     
==========================================
+ Hits         5758     5864     +106     
+ Misses        314      312       -2     

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