The CCS Bar server was crash-looping with:
[X] Cannot read properties of undefined (reading 'length')
Usage records from partially-written or legacy persisted files (e.g. a
Codex rollout scanned mid-write) can be missing modelBreakdowns despite
the type. getHourlyRequestCount() and the daily/monthly/hourly merges
read it unguarded, and the Bar re-runs aggregation every ~5 min and
restarts on crash - hence the loop.
Default modelBreakdowns to [] at every use site and fall back to 0 for
request count. Regression test added for all three merges.
I don't normally work in TS and this was heavily tool-assisted, but it
has fixed the crash loop on my machine.
Tom Price
a7f3e4bc0e