[tonyalaribe]

After #427 a warm 7-day errors list on 6297304f still searched ~291 indexes per query, most of them carried-forward entries on today's packed files (up to 539 covering one file). The census already counts such a file as uncovered (carried entries surrender ordinals), but the backfill dropped all of today's partition to avoid racing the hot-tail packer — and the packer never repacks a file at its target size.

drop_hot_partition now keeps today's files at or above timefusion_light_optimize_target_size, so the backfill rebuilds them as one index within its existing per-pass file/byte budget. Smaller (still-packing) files of today stay skipped.

Test: the hot-partition case table gains a converged file; red when the predicate is ignored.

Local signoff: make ci-signoff fmt/test/pg-smoke/e2e/clippy all pass (attested).

🤖 Generated with Claude Code

[claude]

Review: looks good, small and well-scoped.

• Correctness: drop_hot_partition keeps today's files whose size is at or above the target, and sizes was already in scope. The .max(1) guard means a zero or negative config can't make every file count as converged. A file with no size entry (is_some_and) stays skipped, which is the safe default.
• Race risk, worth verifying: the PR relies on the packer treating files at or above timefusion_light_optimize_target_size as never repacked. Please confirm the packer's own 'full' predicate uses the same threshold (>= vs >, and no slack factor). If the packer can still rewrite a file just over the target, such as a dedup or repair rewrite of today's partition, the backfilled index is voided. That wastes one pass's budget but isn't a correctness bug.
• Style: the closure is computed inside the per-pid loop. target could be hoisted above the loop, which is minor.
• Tests: the case table covers the new branch, including the prefix-marker and disabled cases. It only exercises the predicate in isolation, so there's no test that the backfill actually queues a converged today file. That's acceptable given the existing structure.

I haven't run the build or tests. LGTM, pending the threshold check above.