fix(pipeline): B1-B5 ordering/guards, N1-N3 stats, t-SNE metric and determinism

excluded_codes and group replace before embedding; RoBERTa chunk tokenize;
cross-POS multiset preserve; edge labels use raw similarity; t-SNE precomputed
distance for similarity matrices with deterministic keep order.

Author: Corey-Abramson

.gitignore

@@ -159,3 +159,8 @@ __marimo__/
 !/input
 !/documentation
 !/documentation/**
+!/function
+!/function/**
+!/tests
+!/tests/**
+!pytest.ini

function/vis_tool_core.py

@@ -0,0 +1,4 @@
+[pytest]
+testpaths = tests
+pythonpath = function
+addopts = -p no:dash -p no:debugging