feat(cycle): exclude disturbed temperatures from the symptothermal engine

A fever, illness, alcohol or a late/short-sleep reading can fake or mask
a temperature rise. Add a per-day `temperatureExcluded` flag on
CycleDayLog (migration 0156): when set, the engine drops the reading from
the cover-line baseline AND the shift evaluation, so a spike neither
fabricates nor masks a rise (Sensiplan: the cover line is drawn over the
last six unbracketed values).

Wired end to end — schema + Prisma, the engine's `detectTempShift`
filter, the Zod input/patch schemas, the day-log upsert (partial merge +
change detection), the read DTO, the calendar/insights/coach selects, the
backup round-trip, and the OpenAPI contract (a new boolean on the day-log
and calendar-day DTOs for the iOS client). The log-day sheet gains a
"mark reading as disturbed" toggle that appears once a temperature is
entered, translated across all six locales.

Citation: de.wikipedia "Symptothermale Methode"; myNFP "Temperaturkurve
auswerten" — Störfaktor bracketing.

src/app/api/cycle/calendar/route.ts

@@ -99,6 +99,7 @@ export const GET = apiHandler(async (request: NextRequest) => {
         date: true,
         flow: true,
         basalBodyTempC: true,
+        temperatureExcluded: true,
         ovulationTest: true,
         cervicalMucus: true,
         _count: { select: { symptomLinks: true } },
@@ -125,6 +126,7 @@ export const GET = apiHandler(async (request: NextRequest) => {
     date: l.date,
     flow: l.flow,
     basalBodyTempC: l.basalBodyTempC,
+    temperatureExcluded: l.temperatureExcluded,
     ovulationTest: l.ovulationTest,
     cervicalMucus: l.cervicalMucus,
     hasSymptoms: l._count.symptomLinks > 0,

src/app/api/cycle/insights/route.ts

@@ -90,6 +90,7 @@ export const GET = apiHandler(async () => {
         date: true,
         flow: true,
         basalBodyTempC: true,
+        temperatureExcluded: true,
         ovulationTest: true,
         cervicalMucus: true,
         symptomLinks: { select: { symptom: { select: { key: true } } } },