data-exchange: add a uwlr target + DataMappingProfile (leaf for the openconnector UWLR adapter)

[rubenvdlinde]

Coverage analysis: UWLR (Uitwisseling Leerlinggegevens en Resultaten) is the NL standard for exchanging pupil data + results with publishers/LVS systems. The wire adapter belongs in openconnector (abstraction), but scholiq's data-exchange target enum has no 'uwlr' value and no DataMappingProfile — so the leaf is missing. Small change.\n\nContext: 2026-07 scholiq exhaustive feature-coverage pass.\n\n🤖 Generated with Claude Code

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Gemigreerd van Codeberg — oorspronkelijk Conduction/scholiq#77, geopend door rubenvdlinde op 2026-07-13.

[github-actions]

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