Add bounded hypothesis generation with immutable budget allocations

config/analysis.example.toml

@@ -0,0 +1,6 @@
+# Copy to ignored config/analysis.local.toml.
+# Counts and budget are pinned once per analysis revision.
+[hypotheses]
+min_hypotheses = 3
+max_hypotheses = 5
+initial_budget = 100  # Abstract integer investigation units, not LLM tokens or money