keyword search:
- use FVH for snippets query for 3x snippet query performance
- index 100k tokens per 1MB chunk instead of 10k, indexing all content
- increase snippet length from 45 to 50
- add limit on regex query to be 20k results matching the regex - todo tune more
- log how many fscontent hits on regex query - will use data to tune in future
- minor code adjustments, debug queries if dev build, etc