Note stable region row families across saves

docs/rehost-queue.md

@@ -91,6 +91,10 @@ Working rule:
   - the save-side fixed-row run candidate family is now also the next save-slice seam to keep
     first-class once grounded, because it is the closest save-native candidate family to the
     still-missing cached tri-lane inputs behind `[site+0x310/+0x338/+0x360]`
+  - cross-save fixed-row comparison is tighter now too:
+    `runtime compare-region-fixed-row-runs p.gms q.gms` shows shared shape-family matches even
+    though the best raw `rows_offset` drifts between saves, so the tri-lane-adjacent row family
+    should be treated as a stable shape-family seam rather than a fixed-offset seam
 - Direct disassembly now narrows that acquisition strip further:
   - `0x004014b0` scans the live placed-structure collection at `0x0062b26c`
   - `0x0041f6e0 -> 0x0042b2d0` is the center-cell token gate over the current region