The location for properties (Map elements) was being captured AFTER calling
nextText(), which moves the parser position past the element. This resulted
in incorrect location information.

This commit fixes the timing of location capture for properties by saving
the line and column numbers BEFORE calling nextText().

Changes:
- Modified src/mdo/reader-stax.vm to capture location before nextText() for properties
- Added comprehensive unit tests for location reporting:
  * testLocationReportingForElements() - tests regular elements with exact line/column numbers
  * testLocationReportingForAttributes() - tests XML attributes (root, child.scm.connection.inherit.append.path)
    Note: Attributes get the location of their containing element since XMLStreamReader doesn't
    provide individual attribute positions
  * testLocationReportingForListElements() - tests list elements (modules) with exact line/column numbers

(cherry picked from commit 6f5c837)

# Conflicts:
#	src/mdo/reader-stax.vm