docs: BUILD-LOG for the row 148 landing; Sage SESSIONS line; P19 follow-ups 318-320 script and record

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/SESSIONS.md

@@ -1090,3 +1090,4 @@ are never rewritten or removed; corrections are new entries.
 2026-10-16T21:22:38Z | Sage (Opus 5.5, 1ef1e4f8) | 52f35e7a0 window plan and rollback set pushed (52f35e7a0..dc12dc9c0); Mos ran the re-pin, live 21:12:54Z, no rollback; row 148 r3 back for HR stack overflow (sage-0621/0622) | POST_OK, 139 SMOKE A pass; issues 28824-28828; live 52f35e7a0
 2026-10-16T22:04:33Z | Dewey (Opus 5.5, 84fb346c) | row 148 (#1642) round 3 review, candidate 95ae4736 (sage-0628) | approve, comment 28832, queue rev 1620 (op dewey-r148-v3); s flags and isRule verified (oracle, 4 MiB, stack audit 53/53), paintDoc catch and submit finally killed by e6 and e7; r4 mutants 43/44 (v21 equivalent) and gate rc=0 checked against build.md; ran markdown-preview 19/19 and docs-browser 1/1 singly 22:03:22Z-22:03:31Z; no base drift on 27 paths; 3 non-blocking notes
 2026-10-16T22:14:10Z | Filbert (Opus 5.5, 048f3c63) | row 148 round 3 review (#1642), manifest 95ae4736 rebuilt on 18aee8fa1; 40-cell probe on Sage's slot and two single test files | approve, comment 28835, rev 1623; probe linear (max 2.2 ms at 64 KiB, isRule 266 ms at 4 MiB), 19/19 and 1/1 pass
+2026-10-16T22:25:47Z | Sage (Opus 5.5, 1ef1e4f8) | row 148 landing, #1642 | d4ea7e5a6 pushed after Mos's decision 123 go (mos-0636) and a green 25-step landing gate; row done rev 1624, #1642 closed 28838, Vikunja 318-320 filed; a4779d2a5 docs push; not live until a re-pin on Mos's go