feat(CORE-001D2B): normalize options cache boundaries

docs/roadmap/ROADMAP.yaml

@@ -26,12 +26,12 @@ priority_queue:
   - OPS-001
   - BT-003
 recently_completed:
+  - CORE-001D2B
   - CORE-001D2A
   - CORE-002B
   - CORE-002A
   - CORE-001D1
   - SEC-001
-  - SEC-001A
 states:
   backlog:
     - DATA-002A
@@ -66,6 +66,7 @@ states:
     - CORE-001B
     - CORE-001C
     - CORE-001D2A
+    - CORE-001D2B
     - CORE-002A
     - CORE-002B
   blocked: []

docs/roadmap/backlog/CORE-001D-decimal-boundary-cleanup.yaml

@@ -16,6 +16,7 @@ acceptance_criteria:
 technical_notes:
   - `CORE-001D1` is complete: portfolio/workspace persistence now uses an explicit unit-aware schema with strict validation and atomic saves.
   - `CORE-001D2A` is complete: DataService quote/provider cache normalization is now a named boundary adapter with explicit symbol mismatch rejection and GLD quote-unit repair.
+  - `CORE-001D2B` is complete: option expirations and options-chain payloads now use explicit normalization boundaries with malformed cached payload discard/retry behavior.
   - Remaining focus is the rest of `CORE-001D2` provider/cache normalization plus `CORE-001D3` service entrypoint tightening.
   - Pre-launch policy: unit-aware schema changes may be breaking until persistence is considered live; old flat payloads may fail loudly instead of being migrated.
   - See `docs/CORE-001D_BOUNDARY_CLEANUP_PLAN.md` for the current hotspot inventory and proposed sub-slices.

docs/roadmap/done/CORE-001D2B-options-boundary-normalization.yaml

@@ -0,0 +1,21 @@
+id: CORE-001D2B
+title: Options Chain and Expiration Boundary Normalization
+status: done
+priority: P1
+effort: S
+depends_on:
+  - CORE-001D2A
+tags:
+  - core
+  - decimal
+  - options
+  - cache
+  - provider
+summary: Option expirations and options-chain payloads now use explicit cache/provider normalization boundaries with malformed cached payload discard rules.
+completed_notes:
+  - Added named normalization adapters for option expirations and options-chain payloads in `app/services/data_service.py`.
+  - Cached payload symbol mismatches are discarded instead of being silently reused.
+  - Malformed cached list-shape payloads are discarded and refreshed rather than being treated as valid empty results.
+  - Fresh provider payloads are normalized before caching.
+  - Added focused coverage in `tests/test_options_normalization.py`.
+  - Validated with focused pytest coverage, `make build`, and a targeted browser-visible `/options` check on `main`.