The parse_isotime() function treats datetime strings without timezone
designators as UTC rather than returning naive datetime objects as
specified by ISO 8601. This behavior exists for historical reasons
and backward compatibility.
Update the docstring to clearly document this behavior and point users
to alternatives (datetime.fromisoformat() or iso8601 library directly)
for ISO 8601 compliant parsing of naive datetime strings.
Add test to verify the documented behavior matches actual behavior.
Closes-Bug: #1638124
Assisted-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Change-Id: Ib80e86d08cbe62217120d2aa191b0c65e4ef434f
Signed-off-by: Pavlo Kostianov <pkostian@redhat.com>
dbba34eeb1