Add bounded hypothesis generation with immutable budget allocations

src/viano_bug_analysis/case/assembler.py

@@ -84,6 +84,15 @@ class CaseAssembler:
         prior_refs = []
         for _, checkpoint in reversed(chain):
             details = checkpoint["details"]
+            if details.get("operation") in {"hypotheses-generating", "hypotheses-built", "hypotheses-rejected"}:
+                for field in ("context_ref", "policy_ref", "hypotheses_ref", "registry_ref", "summary_ref", "error_ref"):
+                    if field not in details:
+                        continue
+                    ref = details[field]
+                    if not isinstance(ref, str) or not ref.startswith("analysis/hypotheses/"):
+                        raise CaseBuildError("PREVIOUS_CASE", "Invalid hypothesis artifact checkpoint")
+                    require_file(reader, ref)
+                    excluded.add(ref)
             if details.get("operation") in {"case-interpreting", "case-interpreted", "case-interpretation-rejected"}:
                 for field in ("context_ref", "interpretation_ref", "summary_ref", "error_ref"):
                     if field not in details: