- test_sitemap_export.py: 19 tests covering SEOMAP_ROUTES constants,
build_sitemap_xml() output structure, XML validity, trailing slash
handling, and build_robots_txt() rules + sitemap reference
- test_sitemap_api.py: 7 tests covering /sitemap.xml and /robots.txt
endpoint status codes, content types, content validation, and
auth-gated /regenerate endpoint
Addresses reviewer REQUEST_CHANGES: 'This needs a unit test' and
'Unit test for this type too'