Implement MemorizingCutsComponent; STAB: switch to edge formulation

tests/fixtures/gen_stab.py

@@ -0,0 +1,23 @@
+from os.path import dirname
+
+import numpy as np
+from scipy.stats import uniform, randint
+
+from miplearn.collectors.basic import BasicCollector
+from miplearn.io import write_pkl_gz
+from miplearn.problems.stab import (
+    MaxWeightStableSetGenerator,
+    build_stab_model,
+)
+
+np.random.seed(42)
+gen = MaxWeightStableSetGenerator(
+    w=uniform(10.0, scale=1.0),
+    n=randint(low=50, high=51),
+    p=uniform(loc=0.5, scale=0.0),
+    fix_graph=True,
+)
+data = gen.generate(3)
+data_filenames = write_pkl_gz(data, dirname(__file__), prefix="stab-n50-")
+collector = BasicCollector()
+collector.collect(data_filenames, build_stab_model)