Refactored Lengthy analyze_experiment.py codes

Moved plotting functions to separate file, moved shareable constants to a shareable file, added unit test (with pytest) to check sanity.

Author: kmock930

constants.py

@@ -0,0 +1,14 @@
+# Exponential smoothing parameters
+SMOOTHING_SLIDER_BEST_FITNESS = 0.05
+SMOOTHING_SLIDER_CURRENT_FITNESS = 0.75
+SMOOTHING_SLIDER_INDIVIDUAL_METRICS = 0.3
+
+# Metric weights from our composite fitness
+METRIC_WEIGHTS = {
+    "f1_macro": 0.30,
+    "recall_macro": 0.20,
+    "roc_auc": 0.20,
+    "precision_macro": 0.15,
+    "accuracy": 0.10,
+    "f1_micro": 0.05,
+}

pyproject.toml

@@ -20,4 +20,5 @@ dependencies = [
 [dependency-groups]
 dev = [
     "ruff>=0.14.1",
+    "pytest>=8.3.0",
 ]