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.

docs/api/openapi.yaml

@@ -117,6 +117,8 @@ paths:
                   type: number
                   minimum: 30
                   maximum: 45
+                temperatureExcluded:
+                  type: boolean
                 ovulationTest:
                   type: string
                   enum:
@@ -252,6 +254,8 @@ paths:
                       minimum: 30
                       maximum: 45
                     - type: "null"
+                temperatureExcluded:
+                  type: boolean
                 ovulationTest:
                   anyOf:
                     - type: string
@@ -412,6 +416,8 @@ paths:
                         type: number
                         minimum: 30
                         maximum: 45
+                      temperatureExcluded:
+                        type: boolean
                       ovulationTest:
                         type: string
                         enum:
@@ -6240,6 +6246,8 @@ components:
           anyOf:
             - type: number
             - type: "null"
+        temperatureExcluded:
+          type: boolean
         ovulationTest:
           anyOf:
             - type: string
@@ -6333,6 +6341,7 @@ components:
         - flow
         - intermenstrualBleeding
         - basalBodyTempC
+        - temperatureExcluded
         - ovulationTest
         - cervicalMucus
         - sexualActivity
@@ -6647,6 +6656,8 @@ components:
                     anyOf:
                       - type: number
                       - type: "null"
+                  temperatureExcluded:
+                    type: boolean
                   ovulationTest:
                     anyOf:
                       - type: string
@@ -6677,6 +6688,7 @@ components:
                   - hasSymptoms
                   - confidence
                   - basalBodyTempC
+                  - temperatureExcluded
                   - ovulationTest
                   - cervicalMucus
                 additionalProperties: false