Loops over audit_weak_types + audit_exception_handling from
the 6 audit_inputs, calls aggregate_cross_audit_findings per
audit, sums the buckets per profile.
Cross-audit aggregation is per-aggregate-flat (all findings go
into 1 bucket per audit). The 3-tier finding-to-aggregate
mapping (find_enclosing_function + type registry + file
heuristic) is the next gap - requires per-finding site
classification.
13 aggregate profiles (10 real + 3 candidate placeholders)
+ 4 top-level rollups. Per the spec, the 3 candidate
aggregates (ToolSpec, ChatMessage, ProviderHistory) are
forward-compat placeholders for any_type_componentization_20260621
(NOT on master); the audit's report includes them with
is_candidate: True.
ed