Feature / Fix: Implement CachingExecutor using cache TTL, deprecate old CachedExecutor, respect TTL from response records when caching and do not cache truncated responses. (#129 by @clue)

Feature: Limit cache size to 256 last responses by default. (#127 by @clue)

Feature: Cooperatively resolve hosts to avoid running same query concurrently. (#125 by @clue)