[heathsanchez]

• Tickets addressed: OMM XML reader misses CCSDS namespace-qualified satellite records #1669
• Review: By commit
• Merge strategy: Merge (no squash)

Description

The OMM XML reader used unqualified ElementTree tag paths, causing valid CCSDS NDM XML with the standard urn:ccsds:schema:ndmxml namespace to produce zero satellite records. This patch accepts both the existing unqualified form and the CCSDS-qualified form, retains segment order and per-record validation positions, and continues to reject unrelated namespaces.

The two commits separate the parser/test fix from additional rejection-boundary tests and the release-note snippet. The change is limited to src/utilities/ommHandling.py, src/tests/test_readOMM.py, and the required release-note snippet.

Verification

• Added test coverage for qualified record extraction, orbital-element parity with unqualified input, numeric-unit validation, mixed qualified/unqualified segment ordering, foreign-namespace rejection, bare-root rejection, and incomplete-record numbering.
• Source-native parser/normalizer/public-reader harness: 8/8 focused cases passed; SGP4 orbital propagation was stubbed in this harness.
• Fresh parser-level check: a qualified record and its units were recovered; a bare <segment> root remained rejected; 200/200 seeded unqualified XML differential cases matched the unmodified parser.
• Python py_compile and git diff --check succeeded; release-note snippet compilation completed.
• Pending: full native pytest and actual Basilisk/SGP4 integration. The available local environment lacks pytest, sgp4, and the built Basilisk package. Please keep this PR in draft until repository CI and native tests pass.

Documentation

Adds docs/source/Support/bskReleaseNotesSnippets/1669-omm-xml-namespace.rst to record support for CCSDS namespace-qualified OMM XML.

Future work

Run the native test_readOMM.py and test_readTLE.py suites in Basilisk's supported build/test environment, then review CI and promote from draft once green.