Joseph Doherty
b27b5b9cc1
v2-ci / unit-tests (push) Has been cancelled
Every Boolean under Server/ServerCapabilities/HistoryServerCapabilities read false (the SDK default) even though data and event history were served, so a spec-following client skipped HistoryRead entirely. Each backend now declares what it serves through its own interface: - IHistorianDataSource.ReadCapabilities (Data / Events / ServerTimestamps): Gateway Data|Events; SqlServer + QuestDb add ServerTimestamps (they store ServerTimeUtc, the Gateway stamps read time); Null declares None. A reflection guard requires every production source to declare it itself. - IHistorianDataUpdater.Capabilities (required member): SqlServer and QuestDb declare Insert/Replace/Update/DeleteRaw/DeleteAtTime; the Gateway provider has no updater. The node manager writes the flags on every source/updater assignment (AdvertisedHistoryCapabilities), and the same declarations drive dispatch: an update the updater does not declare is BadHistoryOperationUnsupported without reaching it, the HistoryWrite AccessLevel bit follows a non-empty declaration, and event-history notifier promotion follows the Events flag. Event and annotation update flags stay false (nothing dispatches them). Tests: booted-server wire test per backend + Null + a SqlServer->Gateway rewire pairing on one session; dispatch gating unit test; the #801 live gate now asserts the Gateway flags (not run here). Claude-Session: https://claude.ai/code/session_01GT67ACmpMR7b9LGRPLijMi