feat: fetch a day's statistics in one getAllDayData request

__init__.py

@@ -36,6 +36,12 @@
 
 PLATFORMS: list[Platform] = [Platform.SENSOR, Platform.BINARY_SENSOR]
 
+# Delay before the monthly/yearly/total coordinators are warmed, so the backfill
+# that the daily coordinator kicks off has time to fill the cache they read.
+# Module-level so a test can shrink it; ten real seconds per entry otherwise
+# dominates the end-to-end suite.
+_STAGGER_DELAY_SECONDS = 10.0
+
 
 async def async_setup(hass: HomeAssistant, config: dict) -> bool:
     """Set up the Lumentree integration."""
@@ -122,7 +128,7 @@ async def _prime_coordinators_staggered():
             except Exception as e:
                 _LOGGER.warning("Daily coordinator first refresh failed: %s", e)
             # Give backfill time to populate cache, then refresh stats coordinators
-            await asyncio.sleep(10)
+            await asyncio.sleep(_STAGGER_DELAY_SECONDS)
             for coord, label in (
                 (monthly_coord, "monthly"),
                 (yearly_coord, "yearly"),

const.py

@@ -28,6 +28,11 @@ def get_timezone(hass: HomeAssistant):
 URL_GET_BAT_DAY_DATA: Final = "/lesvr/getBatDayData"
 URL_GET_YEAR_DATA: Final = "/lesvr/getYearData"
 URL_GET_MONTH_DATA: Final = "/lesvr/getMonthData"
+# Single-call replacement for the three per-metric day endpoints above.
+# Note the absence of a "v2/" prefix: the APK contains "lesvr/v2/getAllDayData"
+# because app 3.2.4 targets a different host (lesvrjm.suntcn.com), but against
+# lesvr.suntcn.com the v2 path returns 998 (does not exist) and this one works.
+URL_GET_ALL_DAY_DATA: Final = "/lesvr/getAllDayData"
 
 DEFAULT_HEADERS: Final = {
     "versionCode": "1.6.3",