facebook: verify COPY.md section 5 even though Meta refused the paste

The task asked for a hex compare between what is pasted into Messenger and
COPY.md section 5. There was nothing to paste (R-920), so the half that is
still checkable was checked:

  all four questions BYTE-IDENTICAL to website/gyik.html (hex equal)
  each answer at most three sentences (2/3/3/3), each ending in the gyik link

A refused edit is not a reason to leave the copy unverified.

documentation/audits/facebook-page-details-2026-10-09/README.md

@@ -74,6 +74,11 @@ Searched for, not assumed absent:
 The four questions and answers are written and committed as `marketing/facebook/COPY.md` §5, ready to
 paste the day the feature appears. Same shape as R-917: copy with nowhere to go.
 
+**Verified anyway.** The task wanted a hex compare between the pasted text and §5; with nothing
+pasted, the checkable half was checked — all four questions are **byte-identical to `gyik.html`**
+(hex equal, lengths 45/27/29/24), and each answer holds to its rule: at most three sentences
+(2/3/3/3) and ending in the `gyik.html` link. The numbers are in the report.
+
 ## B3 — the categories, and why these two
 
 Facebook's Hungarian list has **no IT-support, IT-consulting or cloud category**. Eleven terms were