yoi/.yoi/tickets/00001KXS56AS5/resolution.md

Implemented SessionReferenceView common substrate.

The Worker crate now has an immutable session reference view that can build User/Assistant overview items, index user/assistant/system/tool references, search with kind and tool input/output filters, perform bounded reads with truncation metadata, and resolve source refs for future extract staging anchors. Compaction search now uses this common view; read-session behavior remains unchanged for compatibility.

Validation passed:

• cargo fmt --check
• cargo test -p worker session_reference
• cargo test -p worker compact::worker
• cargo test -p worker
• cargo test -p memory
• nix build .#yoi