[Bug]: Anthropic OAuth usage renders low-usage windows as 100% used (utilization ≤1 wrongly scaled ×100)

#58226 Workaround P2 comp/agent

[Bug]: Anthropic OAuth usage renders low-usage windows as 100% used (utilization ≤1 wrongly scaled ×100)

The /usage dashboard misreports a barely-used Anthropic OAuth account as 100% used because the code incorrectly multiplies an already-percentage utilization value by 100 when it is <= 1.