Rename on_this_day to memory_date with exclude-same-year behavior

Renamed the date filter parameter and changed default behavior to match
Google Photos memories - now excludes assets from the same year as the
reference date, returning only photos from previous years on that day.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

custom_components/immich_album_watcher/sensor.py

@@ -114,7 +114,7 @@ async def async_setup_entry(
             vol.Optional("asset_type", default="all"): vol.In(["all", "photo", "video"]),
             vol.Optional("min_date"): str,
             vol.Optional("max_date"): str,
-            vol.Optional("on_this_day"): str,
+            vol.Optional("memory_date"): str,
             vol.Optional("city"): str,
             vol.Optional("state"): str,
             vol.Optional("country"): str,
@@ -211,7 +211,7 @@ class ImmichAlbumBaseSensor(CoordinatorEntity[ImmichAlbumWatcherCoordinator], Se
         asset_type: str = "all",
         min_date: str | None = None,
         max_date: str | None = None,
-        on_this_day: str | None = None,
+        memory_date: str | None = None,
         city: str | None = None,
         state: str | None = None,
         country: str | None = None,
@@ -227,7 +227,7 @@ class ImmichAlbumBaseSensor(CoordinatorEntity[ImmichAlbumWatcherCoordinator], Se
             asset_type=asset_type,
             min_date=min_date,
             max_date=max_date,
-            on_this_day=on_this_day,
+            memory_date=memory_date,
             city=city,
             state=state,
             country=country,