REBUILD.md: probe_candidates back on the NVMe (migration 7300)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

REBUILD.md

@@ -717,10 +717,13 @@ releases; the inspector matches them again), `nntp_shares`, `nodes`,
 - Gone: `fragments`, `range_blocks`, `release_final()` (final = finished:
   `settled_at IS NOT NULL`), the settler, the fragment merger,
   `releases_category_newest_idx`.
-- `release_inspections` and `probe_candidates` on `CHUNK_TABLESPACE` (the
-  HDD) with their indexes. Note LOG.md 2026-10-19 (81): the judge's fake
-  rule read all of `release_inspections` every round, 17 min on the HDD;
-  the judge must read it by release or keep what it needs on the NVMe.
+- `release_inspections` and `probe_candidates` were on `CHUNK_TABLESPACE`
+  (the HDD) with their indexes; both are back on the NVMe (migrations 4800
+  and 7300). Note LOG.md 2026-10-19 (81): the judge's fake rule read all of
+  `release_inspections` every round, 17 min on the HDD; and 2026-11-03
+  (136): the prober's catalog claim updates `probe_candidates` from random
+  points every minute, 2–3 min on the HDD beside the pending ladder's sweep.
+  What a worker reads or updates by random key every minute stays on the NVMe.
 
 ### Batch store (built 2026-10-25)