feat(dashboard): resolve the selected score rings on the snapshot

Resolve the selected rings server-side and publish them as scoreRings
on the dashboard snapshot (additive, optional for cached payloads).
READINESS, RECOVERY_SCORE and SLEEP_SCORE go through the same
computeDerivedMetric dispatcher the derived batch route calls, with the
profile loaded once via the shared loader; MED_COMPLIANCE pools the
7-day adherence across active non-PRN medications through the canonical
compliance engine (taken over taken-plus-missed, skips out of the
denominator) and bands on the targets-tile thresholds. Rings gate on
their owning module plus the insights gate for the derived trio, drop
out when no data backs them, and resolve fail-soft per ring so a
throwing engine never sinks the snapshot. OpenAPI regenerated.

docs/api/openapi.yaml

@@ -21417,6 +21417,38 @@ components:
           description: Personal health score summary (0..100 score, traffic-light band, week-over-week delta). Null on a
             rollup-coverage miss (it rides the thick phase alongside `extras`) and when no pillar is computable.
             Component breakdown is deliberately not serialised here.
+        scoreRings:
+          description: "User-selected hero score rings (max 3, `selectedScoreRings` on the dashboard layout), resolved
+            server-side: READINESS / RECOVERY_SCORE / SLEEP_SCORE via the derived engines (module-gated like
+            `/api/insights/derived`), MED_COMPLIANCE as the pooled 7-day medication adherence (0..100, banded ≥90 green
+            / ≥70 yellow / else red). Only rings with data appear, in selection order — a missing entry means no data or
+            a disabled module, never zero. Clients render what arrives and never recompute."
+          type: array
+          items:
+            type: object
+            properties:
+              id:
+                type: string
+                enum:
+                  - READINESS
+                  - RECOVERY_SCORE
+                  - SLEEP_SCORE
+                  - MED_COMPLIANCE
+              score:
+                type: integer
+                minimum: -9007199254740991
+                maximum: 9007199254740991
+              band:
+                type: string
+                enum:
+                  - green
+                  - yellow
+                  - red
+            required:
+              - id
+              - score
+              - band
+            additionalProperties: false
         briefing:
           anyOf:
             - type: object