docs: publish-cycle says what a WARN or ERROR from the page export after publish means, architecture names the page export as the way out for a reader that cannot ask (#214 close); 10.0.0-beta.14

Files changed:
- CHANGES.md
- VERSION
- docs/explanation/architecture.md
- instructions/publish-cycle.md

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SnAJ7Z3CpVD3PRbN73QtU2

instructions/publish-cycle.md

@@ -58,6 +58,13 @@ consistent.
   writable, say. Do **not** run `publish` again: it would have nothing to push and back nothing up.
   Once the user has fixed the cause, `tools/wikitool backup run` repeats the backup
   ([docs/how-to/back-up-to-a-synced-folder.md](../docs/how-to/back-up-to-a-synced-folder.md)).
+- **A `WARN` that a page export failed?** The same: the commit and the push stand, `publish`
+  exited 0, and the line names the target and the reason - a page someone edited in the target
+  folder, say. Show it to the user and do **not** run `publish` again; once the cause is fixed,
+  `tools/wikitool export run` refreshes the target
+  ([docs/how-to/export-to-a-synced-folder.md](../docs/how-to/export-to-a-synced-folder.md)).
+  An `ERROR` about the `export` section instead stopped `publish` before it committed: the section
+  is the user's to fix by hand, and nothing was published.
 - **Query or lint pass?** Neither auto-publishes. Run `publish` only if asked to.
 - **Nothing under `kb/` changed?** Skip steps 1 and 2; a change to `tools/` or `instructions/`
   does not affect the catalog.