Co-authored-by: NLevi Bowman <lbowman@trace3.com>

feat(griffin): added count(string), count(symbol) and count(long256). Also added rnd_long256(count) (#556)

Fixed "mask" values in all of hash tables. This was casing keys to be poorly distributed across arrays forcing high number of key collisions. I also created Long256HashSet and fixed a bug in SelectedRecord to do with addressing long256 column. All of that is tested.

This change deals with issues around protocol mechanics, in particular our responses to messages from the client on simple and extended mode.

For example:

- we now wait for sync message to send reply back, therefore grouping replies. This means that if client sends messages: P/B/D/E/S, we now send one reply back with 1/2/T/D/C/Z. This means that there is less chatter on the wire because 1. we are sending less messages and 2. the client does not get confused and therefore send less messages.
- for each message sent by client, we send an acknowledgement back
- stop sending spurious messages
- named prepared statements are cached on parse and we correctly bind parameters when receiving named statement on the Bind and Describe messages
- when executing 'select', we now send back the number of returned rows
- when executing 'set', we now send correct query tag (SET)
- for empty queries, we reply back with correct message type
- for queries with no data, we reply back with 'no data' message type
- row description now includes column number
- row descriptions attempts to populate type size and type modifier

Functions like first(symbol) could not work in any of the aggregation cursors. Access to symbol table was complex and incorrect. Functions were initialized with wrong cursor and symbol table access was overcomplicated to compensate for wrong cursor!

fix: memory leak in DirectLongList. Refactored configurations to have "default" class for each configuration element. (#495)

chore(griffin): implemented final artifact to allow psychopg2 to connect and execute raw SELECT. (#461)

feat(griffin): cancel active read-only queries on client disconnect; added resource constraints (#396)

chore: excluding test function factories from production run. Added handling of unexpected exceptions. Fixed #367 (#392)

chore: improved accuracy of round() by more consistent use of tolerance. The latter is adjusted to be lower. JsonQueryProcessor now prints doubles up to scale of 12. (#301)