Audit this run using only saved evidence and approved, non-billed account
information already available. Do not issue another paid research query.

For every numeric claim, identify its source file and country. Flag
missing, inconsistent or unsupported values. Confirm the final work stayed
within the approved targets and result limits.

Complete COST-LEDGER.csv: operation, arguments_reference, status,
billing_basis_source, balance_before, balance_after, reported_charge,
attribution_status and notes. Use unknown where data is unavailable.
A shared-account balance difference is not automatically this run's cost.
Separate verified vendor charges, estimates and model usage.

Produce CHECKS.md listing passed checks, unresolved issues and which
additional actions need approval. Do not publish, update the website or
turn the research into an automatic recurring job.
