HealthStatsSync: refresh today's weekday _sleepData typicals

The existing daily 6-day loop deliberately skips today (incomplete
current-day daily fields shouldn't overwrite the watch's
accelerometer-tracked values), but the firmware reads
`<today's weekday>_sleepData` typicals on the sleep summary card.
Without this extra write the typicals for today's weekday stay
stale for a day after the new typical-sleep code starts running.

After the daily loop, add a typicals-only blob for today's weekday
with last_processed_timestamp=0. Firmware's prv_notify_health_listeners
gates the in-memory daily-metric update on a valid timestamp and bails
out, so daily fields=0 don't corrupt today's tracked values, but
health_db_insert still stores the blob — making the typicals readable
via health_db_get_typical_value.

This brings sleep typicals in line with the step typicals, which
already cover all 7 weekdays via their separate per-weekday loop.

Author: aveao

libpebble3/src/commonMain/kotlin/io/rebble/libpebblecommon/services/HealthStatsSync.kt

@@ -129,6 +129,29 @@ internal suspend fun updateHealthStatsInDatabase(
         ))
     }
 
+    // The loop above skips today's weekday by design (incomplete current-day daily fields
+    // shouldn't overwrite the watch's accelerometer-tracked values). But today's weekday's
+    // _sleepData blob is exactly what the firmware reads for "today's typical sleep" on the
+    // sleep summary card, so without this extra write its typicals stay stale for a day.
+    // Send a typicals-only blob with last_processed_timestamp=0; firmware's
+    // prv_notify_health_listeners gates the in-memory daily-metric update on a valid
+    // timestamp and bails out, so the daily fields=0 don't corrupt today's tracked values.
+    // health_db_insert still stores the blob, so the typicals are readable.
+    SLEEP_KEYS[today.dayOfWeek]?.let { todaySleepKey ->
+        val todaySleepPayloadData = sleepPayload(
+            dayStartEpochSec = 0L,
+            sleepDuration = 0,
+            deepSleepDuration = 0,
+            fallAsleepTime = 0,
+            wakeupTime = 0,
+            typicals = sleepTypicals[today.dayOfWeek],
+        )
+        stats.add(HealthStat(
+            key = todaySleepKey,
+            payload = todaySleepPayloadData.toByteArray()
+        ))
+    }
+
     // Per-weekday typical-step blobs (consumed by firmware activity_insights for the
     // "X% above/below typical" comparison in the end-of-day activity summary notification).
     val typicalsByWeekday = computeAllWeekdayTypicalSteps(healthDao, today, timeZone)