Sets some reasonable limits, which are higher when logged in since that
infers a little extra trust.
Helps prevent against large resource consuption attacks via super heavy
search queries.
Thanks to Gabriel Rodrigues AKA TEXUGO for reporting.
Added a formal object type to carry across vector search results.
Added permission application and entity combining with vector search
results.
Also updated namespace from vectors to queries.
This changes indexing so that a.b now indexes as "a", "b" AND "a.b"
instead of just the first two, for periods and hypens, so terms
containing those characters can be searched within.
Adds hypens as a delimiter - #2095
