feat(browse): Wave-0 Batch C — CapturingAddressSpaceBuilder + CapturedTreeBrowseSession
Task 6: CapturedTree/CapturedNode model + CapturingAddressSpaceBuilder — an in-memory
IAddressSpaceBuilder that records a driver's DiscoverAsync stream (folder nesting,
leaf FullName as node id, alarm mark, node-cap truncation, no-op alarm sink).
Task 7: CapturedTreeBrowseSession — serves the captured snapshot through IBrowseSession
(Root/Expand/Attributes from memory, truncation marker, shared-immutable-tree dispose).
13 unit tests green.
Joseph Doherty
15da8d4f0d