docs: record CORE-001D1 completion

docs/roadmap/done/CORE-001D1-persistence-seam.yaml

@@ -0,0 +1,22 @@
+id: CORE-001D1
+title: Portfolio Persistence Serialization Seam
+status: done
+priority: P1
+effort: M
+depends_on:
+  - CORE-001B
+  - CORE-001C
+tags:
+  - core
+  - decimal
+  - persistence
+  - workspace
+summary: Portfolio and workspace persistence now use an explicit unit-aware schema with strict validation and atomic saves.
+completed_notes:
+  - Added `schema_version: 2` persistence envelopes for portfolio/workspace config storage.
+  - Persisted bookkeeping-sensitive numeric values now carry explicit unit or currency metadata.
+  - Load path now rejects invalid JSON, unsupported schema versions, malformed payload shapes, and incomplete v2 payloads.
+  - Save path now validates before writing and replaces files atomically.
+  - Invalid workspace config files are no longer treated as routeable workspaces.
+  - Legacy non-workspace routes were removed so canonical workspace URLs are the only supported dashboard paths.
+  - Validated with unit tests, `make build`, and live Playwright on `main`.