The whole sharded schema sat in one tablet, so no number of tablet
servers, scan servers or compactors made any difference to a query.
Splits now come from a checked-in file, the deployment moves to three
shards per day, and verifySplits.sh guards that in CI.
Also fixes the num shards cache, which scanned a metadata table name no
deployment that renames its tables actually uses. The missing table was
swallowed, so a day expanded into no shards and the query silently
returned nothing.
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Co-authored-by: Claude Opus 5 <[email protected]>
