Remove thumb from database field (#16647)

* Remove thumbnail from dict

* Create thumbnail diectory

* Cleanup handling of tracked object images

* Make thumbnail optional

* Handle cases where thumbnail is used

* Expand options for thumbnail api

* Fix up the does not exist condition

* Remove absolute usages of thumbnails

* Write thumbnails for external events

* Reduce webp quality

* Use webp everywhere in frontend

* Formatting

* Always consider all events when re-indexing

* Add thumbnail deletion and cleanup path management

* Cleanup imports

* Rename def

* Don't save thumbnail for every object

* Correct event count

* Use correct function

* Include thumbnail in query

* Remove unused

* Fix requiring exception

web/src/views/explore/ExploreView.tsx

@@ -262,7 +262,7 @@ function ExploreThumbnailImage({
           }
           loading={isSafari ? "eager" : "lazy"}
           draggable={false}
-          src={`${apiHost}api/events/${event.id}/thumbnail.jpg`}
+          src={`${apiHost}api/events/${event.id}/thumbnail.webp`}
           onClick={() => setSearchDetail(event)}
           onLoad={onImgLoad}
           alt={`${event.label} thumbnail`}