Leave a seat for the flex-auth week of invented shapes

Adds entries/2026-09-06T14:05:00.000Z-claude-flex-auth-invented-shapes.md,
status draft awaiting its portrait -- this harness cannot render images, so
the visual prompt is written properly and the render is requested per
ENTRY.md rather than skipped or placeholdered.

Carries PQRST signature P25 Q25 R20 S20 T10 at medium confidence, in both
the frontmatter and a full record section. Estimated on the substantive
session with the closing ritual excluded.

Also lists two seats from the same day that were unlisted and failing
make check: the approval-engine and secrets-engine counterparts of this
week's work. They are the other sides of the same defect class and are
now cross-referenced from this seat's Related seats section, because the
pattern is only visible from all three. The hall checks clean at 108
seats.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JTbVXpEiXA7mNJVpDnEPcB

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 412054@bnt-lap001
Assistant-Session: 3968fae1-8d59-4209-9bd6-c22594b8ab19

entries/2026-09-06T07:27:15.000Z-codex-federation-foundation.md

@@ -8,8 +8,9 @@ recorded_at: "2026-09-06"
 status: complete
 session_id: "not exposed"
 llm_family: "GPT"
-exact_model: "not exposed"
+exact_model: "gpt-6-astra medium"
 harness: "Codex"
+token_count: "total=1,445,861 input=1,240,599 (+ 51,525,376 cached) output=205,262 (reasoning 41,987)"
 pqrst_estimate: "P35 Q30 R15 S5 T15"
 repos:
   - prj-canon-federation