Cache initial SQL blocklist queries

[brannondorsey]

Blocklist queries on initial pageload and whenever a filter is applied are very costly to the SQL server. There isn't a lot we can do about the filter queries, but we could cache the initial pageload query as the results will only change each time we parse re-parse the blockchain (and review messages). In particular, here are the queries I intend to cache:

SELECT DISTINCT block_height FROM coinbase_messages_unique ORDER BY block_height;
SELECT DISTINCT block_height FROM address_messages_unique ORDER BY block_height;
SELECT DISTINCT block_height FROM op_return_address_messages_unique ORDER BY block_height;
SELECT DISTINCT block_height FROM coinbase_messages_unique WHERE valid = 1 ORDER BY block_height;
SELECT DISTINCT block_height FROM address_messages_unique WHERE valid = 1 ORDER BY block_height;
SELECT DISTINCT block_height FROM op_return_address_messages_unique WHERE valid = 1 ORDER BY block_height;
SELECT DISTINCT block_height FROM coinbase_messages_unique WHERE nsfw = 0 ORDER BY block_height;
SELECT DISTINCT block_height FROM address_messages_unique WHERE nsfw = 0 ORDER BY block_height;
SELECT DISTINCT block_height FROM op_return_address_messages_unique WHERE nsfw = 0 ORDER BY block_height;
SELECT DISTINCT block_height FROM coinbase_messages_unique WHERE bookmarked = 1 ORDER BY block_height;
SELECT DISTINCT block_height FROM address_messages_unique WHERE bookmarked = 1 ORDER BY block_height;
SELECT DISTINCT block_height FROM op_return_address_messages_unique WHERE bookmarked = 1 ORDER BY block_height;

[brannondorsey]

Done.