erio
22680dc602
test(usage): add unit tests for account_cost and fix gofmt
- Fix mock for GetModelStatsWithFilters: add account_cost column
- Add assertion: GetStatsWithFilters always returns TotalAccountCost
- New test: GetModelStatsAccountCostColumn verifies scan of AccountCost
- New test: GetGroupStatsAccountCostColumn verifies scan of AccountCost
- New test: GetStatsWithFiltersAlwaysReturnsAccountCost (no AccountID filter)
- Integration test: add TotalAccountCost/TodayAccountCost assertions
- Fix gofmt alignment in usage_log_types.go