Trivial "Do Do" false-positives

[mubaldino]

Describe the bug "Do. Do", "do. Do", "in Do"`, etc. are common false positives found still.

To Reproduce Xponents 3.3

Expected behavior Better filtering of these. Likely use a spaCy NER model to offer POS tags and eliminate obvious errs.

[mubaldino]

Add "text_norm" to indexer to review common false-pos still appearing.

[mubaldino]

Addressed in part by NonSenseFilter -- removing lowercase matches.

[mubaldino]

Seems more like gazetteer ETL fixes than a pattern generalization. If such trivial gazetteer entries should never be tagged, then we mark them search_only=1