find_votes and list_votes fixes

SQL function get_account renamed find_account_id to follow naming scheme.

Vote related views/types/functions extended by id since database_api requires it.

New SQL function to cover find_votes functionality.

[Fix]: Neither voter nor post is mandatory in list_votes calls.

[Fix]: fixed internal _get_post_id in bridge_api

find_votes_impl no longer requires full context, just what it actually uses: db; it also no longer checks passed arguments, only its official API version does.

list_votes_impl removed since only its official version is needed

[Fix]: Official API find_votes/list_votes now properly pack response in dictionary with 'votes' list

hive/db/schema.py

@@ -1822,9 +1822,12 @@ def setup(db):
             SELECT
               hp1.id
             , hp1.sc_trend as trend
-            FROM hive_posts hp1 WHERE NOT hp1.is_paidout AND hp1.depth = 0 ORDER BY hp1.sc_trend DESC LIMIT _limit
+            FROM hive_posts hp1 WHERE NOT hp1.is_paidout AND hp1.depth = 0
+            ORDER BY hp1.sc_trend DESC, hp1.id
+            LIMIT _limit
         ) as trends
-        JOIN hive_posts_view hp ON hp.id = trends.id ORDER BY trends.trend DESC
+        JOIN hive_posts_view hp ON hp.id = trends.id
+        ORDER BY trends.trend DESC, trends.id
         $function$
         language sql
     """