0117e1501b
B6 moved the address-space-rebuild span into ApplyPlan, so the two rebuilds that complete synchronously on the actor thread (no applier -> raw-sink rebuild; no artifact bytes -> held) stopped emitting it (OtOpcUaTelemetryHookTests.RebuildAddressSpace_starts_an_address_space_rebuild_span). Both now open their own span. B7 (late HistorianDataSource / HistorianDataUpdater re-evaluate the capability bits) reversed three tests that pinned the old "fixed at materialisation" contract. Re-expressed against the new one, end to end: - events: a folder promoted without a source is unsupported, then served once a source is wired (source reached); - in-process HistoryUpdate: clearing the updater retracts HistoryWrite and the old updater is never reached; - over the wire: a late updater lights HistoryWrite and an insert reaches it; a reset retracts the bit and the insert is BadHistoryOperationUnsupported. Refs #732 Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT