docs: register Filbert row 136 round 1 review (approve)

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

docs/SESSIONS.md

@@ -1017,3 +1017,4 @@ are never rewritten or removed; corrections are new entries.
 2026-10-15T18:56:04Z | darkwing | row 121 (#1615) round 2 correction to my 18:54:54Z line | reviewer stays Dewey (sage-0367); moved to in-review, revs 1349-1350, request comment 28614 posted as darkwing; BUILD.md reviewer name fixed in dd7c22295 and d7ebaa9a5
 2026-10-15T19:00:29Z | Dewey (Opus 5.5, 84fb346c) | row 121 (#1615) round 2 review, candidate 710d5086 | approve, comment 28615, rev 1351; single files only (7 files, 0 fail); non-blocking: BUILD.md projects claim, idle-refusal log dedupe, chief-of-staff assert nit; F6 READMEs non-blocking
 2026-10-15T19:07:41Z | Sage (Opus 5.5, 1ef1e4f8) | row 121 (#1615) round 2 landing | landed 2c16d6b93 after the full gate on d7ebaa9a5 (24 suites, 0 failed), done rev 1352, sweep 496e26e0e (revs 1349-1352); F6 and Dewey's notes N1-N3 ruled follow-ups (sage-0369), P19 task 311; window plan updated for 3e
+2026-10-15T22:32:54Z | Filbert (Opus 5.5, 048f3c63) | row 136 round 1 review (#1630, approvals bind to the role instance and thread) | approve, comment 28621, rev 1382, candidate 38b0d3cd...11e8