docs: the ingest and maintenance how-tos say the generated indexes, log and provenance do not count toward the Mass-Update Gate (#191)

Files changed:
- docs/how-to/ingest-a-source.md
- docs/how-to/maintain-the-wiki.md

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

docs/how-to/maintain-the-wiki.md

@@ -47,7 +47,8 @@ tools/wikitool sources trace --page "HA Integration"    # which raw files this p
 
 ## Where the agent stops
 
-- **Publishing ten or more files** stops at the Mass-Update Gate (exit 42). A lint pass that repairs
+- **Publishing ten or more files** stops at the Mass-Update Gate (exit 42); the generated indexes,
+  `kb/log.md` and `kb/provenance.md` are not counted. A lint pass that repairs
   many pages does this routinely. The agent shows you the full file list and the `--confirm` line,
   and publishes only after you approve. The token is a digest of that file list, so your approval
   never covers a changeset you did not see.