Docs: the .ai issue counts in G9 and the file-exchange discount are dated

Both passages still name guides among the open .ai issues. They now say the
counts were measured on 2026-10-10, before #779 closed.

docs/gaps.md

@@ -169,7 +169,7 @@ from G14 and the budget run of G15: **~170–270 h** one agent, ~50–80 h wall
   omitted, hidden objects go to a hidden layer, are omitted or made visible), and type is set again in the
   reader's fonts. Legacy type in `.ai` files in PostScript form is read on open. It waits for testing by users
   who hand files back.
-- **Evidence:** the issues above; 28 of the 350 issues are about `.ai`/EPS (about 22 people, the most common single
+- **Evidence:** the issues above; 28 of the 350 issues measured on 2026-10-10 are about `.ai`/EPS (about 22 people, the most common single
   format theme), 20 fixed, and the 8 open ones are about structure (layers, guides, speed, live objects), not missing
   art. No real-file `.ai` corpus (users' files may be used locally, never committed).
 - **Impact:** blocks anyone who hands files back to Illustrator users. Opening and reworking their own archive

docs/target-app-parity.md

@@ -221,7 +221,7 @@ generative AI, pen tilt, languages beyond their own) are left out. **Essentials:
 The discounts, with the evidence:
 
 - **Illustrator's own files (×0.92).** `.ai` and EPS open as editable art by reading their PDF/PostScript and the
-  structure of the editing data. Users do open legacy files a lot: 28 of the 350 issues (8%, ~22 people) are
+  structure of the editing data. Users do open legacy files a lot: 28 of the 350 issues measured on 2026-10-10 (8%, ~22 people) are
   about `.ai`/EPS, the most common single format theme. 20 of the 28 are fixed (often the same day). The 8 open
   ones are about structure, not missing art: layers flattened or multiplied (#951: 109 layers instead of 14;
   #868), guides lost (#779), slower opening (#758), live effects, brushes and symbols as their drawn look