Remove the version checks around add_note()

[eda-s-claude-bot]

Bug Fixes

• All 36 Exception.add_note() call was wrapped in if version_info >= (3, 11):, so the note was attached only on
  Python 3.11 and newer. This package requires Python 3.11 or newer
  (setup.py: pythonVersions=("3.11", "3.12", "3.13", "3.14")), so the condition is always true and the guard is a
  leftover from supporting 3.10.

  ex = TypeError(f"Parameter 'name' is not of type 'str'.")
  ex.add_note(f"Got type '{getFullyQualifiedName(name)}'.")
  raise ex

• The # pragma: no cover markers go with them: those lines were never covered because the false branch cannot be
  reached, and marking reachable code as uncoverable hides it from the coverage report.

Changes

• from sys import version_info is dropped where nothing else used it.
• ReportException also carried a polyfill: under Python <3.11 it declared __notes__ and implemented
  add_note() itself. That branch can no longer be taken, so the class is the plain base-exception it was meant to
  be - with the doc-string it never had.

Unit Tests

• Unchanged: 157 passed with 65 subtests, plus 8 application tests.

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Related Issues and Pull-Requests

• Same cleanup in pyTooling (#277), pyEDAA.IPXACT and
  pyEDAA.ProjectModel, following a review comment in
  pyTooling#274: "pyTooling is Python 3.11+, so no version check
  is required."