feat(cli): add db path global option

- feat(evaluation): model evaluation script with msmarco dataset
- fix(hash): use stronger hash algorithm

Author: Daniele Briggi

model_evaluation/README.md

@@ -0,0 +1,5 @@
+  # 1. Process dataset
+  python test_ms_marco.py process --config example_config.json --limit-rows 100
+
+  # 2. Evaluate (saves to example_config_evaluation_results.txt)
+  python test_ms_marco.py evaluate --config example_config.json --limit-rows 100