ExcelParser.__init__ called get_progress_tracker() without importing it,
so every instantiation raised NameError and the class was unusable. The
existing test imported ExcelParser but never constructed it, so nothing
caught it. Same defect as #530 in SimilarityCalculator, which was fixed
without sweeping the rest of the codebase.
Add construction coverage for every parser exported from semantica.parse,
driven off __all__ so later additions are covered automatically. These
live outside test_parse_comprehensive.py, whose setUp patches
get_progress_tracker into each parse module and would mock away the
interaction under test.
Closes#1014
Co-authored-by: Pravit Ampapathini <pravitampapathini@Pravits-MacBook-Air-3.local>
