docs: record CORE-002 completion

docs/roadmap/done/CORE-002-instrument-aware-quote-units.yaml

@@ -0,0 +1,20 @@
+id: CORE-002
+title: Instrument-Aware Quote Units and Conversion Multipliers
+status: done
+priority: P0
+effort: M
+depends_on:
+  - CORE-001A
+  - CORE-001B
+  - CORE-001C
+tags:
+  - core
+  - units
+  - pricing
+  - domain
+summary: Instrument-aware quote-unit semantics are now rolled out across overview, hedge/runtime, and historical workspace-derived paths.
+completed_notes:
+  - `CORE-002A`: overview now treats GLD quotes as USD/share and converts through explicit instrument metadata.
+  - `CORE-002B`: hedge/runtime now recomputes live collateral metrics from converted quote-unit semantics.
+  - `CORE-002C`: historical/backtest/event workspace defaults now convert stored collateral weight into GLD share units explicitly.
+  - Unsupported or missing conversion metadata fails closed instead of being guessed.