Add NAV/EKÁER reporting layer to AyCode.Services
- Nav/ base layer: INav* interfaces, NavAuthHelper (SHA-512 passwordHash +
requestSignature in UTC), NavXmlHelper (UTF-8 XML), NavReportServiceBase
(HTTP POST + (de)serialize + error handling), NavReportException.
- Nav/Ekaer/: 62 XSD-generated models (Models/ + Models/Common/ — separate
namespaces resolve the TradeCardType enum-vs-class clash), 5 partial adapters
binding the generated types to the Nav interfaces, EkaerManageService +
EkaerQueryService.
- Nav/docs/: ekaermanagement.xsd + common.xsd + LLM-friendly extracts
(INTERFACE / TRADECARD / OPERATIONS / VALIDATION).
- AyCode.Services.Tests/Nav/: NavAuthHelper verified against the official EKÁER
PDF test vector + adapter interface-mapping tests (10 pass).
- csproj: register Nav/docs *.xsd and *.md.