Optimize bridge_get_account_posts_by_replies by moving "ORDER BY ar.id DESC" out of inner query so that optimizer doesn't think it should do a sequential scan of hive_posts (the LIMIT + ORDER BY seems to have led it astray). Previous code was too slow when the author didn't have any posts that could be replied to.

[ABW]: fexed validation of author in bridge.get_account_posts/feed and condenser_api.get_discussions_by_feed
also pages no longer overlap in those calls

Merge branch 'abw_get_discussions_by_feed_fixes' of gitlab.syncad.com:hive/hivemind into abw_get_discussions_by_feed_fixes

- After creating indexes ANALYZE statement is called automatically
- db_upgrade performs an VACUUM FULL ANALYZE spawn if needed
- update procedures notify about their execution

Fixes in get_discussions_by_feed

See merge request !438

- Fixed bug causing to leave all old reputation data (which shall be truncated)

See merge request !439

notification id generation fix

See merge request !443

Another temp. fix related to ID generation.

See merge request !444

notification cache use autoincrement id

See merge request !445

Added hive_notification_cache table supplement (autoincrement definition for id column).

See merge request !447