Limit number of samples per result

Currently if you run a query that's not very specific, you might get a (word,lemma,type) combination with many hits. There's probably no need to collect every single hit and return them all at once to the browser.
Maybe the list of samples could be truncated to a certain hard limit. Possibly with the option to fetch the full list separately.

The issue does not name a file, test, or entry point, so first trace how query results are collected and returned to the browser. Clarify the sample limit and whether a separate full-list request is required; done means the agreed behavior is implemented and verified for broad queries.

Written by the indexing model from the issue text.