Enable filtering Already Read by year read

[cdrini]

The dropper was never actually displaying, since I think the header_title has been changed to include a count. This fixes it to use the key, and also switched it to use BookshelvesEvents, since people can log year read without necessarily using the yearly reading goals feature.

Technical

Testing

Tested the query on prod and no Seq Scans:

 Sort  (cost=17.87..17.87 rows=1 width=9) (actual time=0.130..0.132 rows=5 loops=1)
   Sort Key: ("substring"(event_date, 1, 4))
   Sort Method: quicksort  Memory: 25kB
   ->  HashAggregate  (cost=17.84..17.86 rows=1 width=9) (actual time=0.106..0.109 rows=5 loops=1)
         ->  Index Only Scan using bookshelves_events_user_checkins_idx on bookshelves_events  (cost=0.42..17.76 rows=16 width=9) (actual time=0.032..0.089 rows=19 loops=1)
               Index Cond: ((username = 'ScarTissue'::text) AND (event_type = 3))
               Heap Fetches: 19
 Total runtime: 0.176 ms

Screenshot

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