fix(insights): strip MOOD from the period-narrative measurement query

MOOD is mood-entry backed, not a MeasurementType; it was filtered out of
DISCOVERY_BEHAVIOURS but not DISCOVERY_OUTCOMES, so it leaked into the
measurement.findMany type filter and threw PrismaClientValidationError,
failing the period-narrative warm job.

src/lib/insights/narrative/period-narrative.ts

@@ -481,7 +481,7 @@ export async function buildPeriodNarrativeContext(
       ...DELTA_METRICS.map((m) => m.type),
       ...VITALS_BASELINE_TYPES,
       ...DISCOVERY_BEHAVIOURS.filter((k) => k !== "MOOD"),
-      ...DISCOVERY_OUTCOMES,
+      ...DISCOVERY_OUTCOMES.filter((k) => k !== "MOOD"),
     ]),
   ) as MeasurementType[];