Docs audit fixes: kiosk code drift, PowerShell chains, broken links, leaks

From the Fable/Opus documentation audit (8 confirmed + verified
lab-drift the run's session limit had cut short):
- HIGH: the lab's kiosk _kiosk_find_item block showed the pre-stage-17
  row-id resolver as current; replace with the shipped gagelabtag /
  numeric-tail resolver, fix the stale 'resolved by row id' prose and
  the 'stage-7 code is corrected' note.
- MED: the badge _external_lookup block used dict-only row access that
  breaks on a tuple cursor; use the tuple-or-dict form shipped. Split
  '&&' command chains (fail in PowerShell 5.1) in the lab.
- LOW/link: the Windows note's [DEVELOPMENT-SETUP] link dropped the .md
  and 404'd in four docs; fix. Correct the stage-6a->16a comment and
  the lab-stage tag range (..16 -> ..17).
- Leaks: drop /home/camp path from ADR-006, the internal gitea host
  from PLUGINS.md.
- Windows: add an mklink junction note for the external-plugin symlink
  dev loop.
- CI: prime root to mysql_native_password so pymysql connects to the
  MySQL 8 service without the cryptography package (and its kit wheel).

.github/workflows/ci.yml

@@ -75,10 +75,16 @@ jobs:
           python-version: '3.12'
           cache: pip
       - run: pip install -r requirements.txt
-      - name: Force utf8mb4 on the CI database
+      - name: Prime the CI database (utf8mb4 + native auth for pymysql)
+        # MySQL 8 defaults root to caching_sha2_password, which pymysql can
+        # only speak with the 'cryptography' package. Rather than add that
+        # dependency (and its offline wheel), switch root to native auth here
+        # via the mysql CLI, so the app's pymysql connections work as-is.
         run: |
           mysql -h 127.0.0.1 -uroot -proot -e \
-            "ALTER DATABASE shopdb_ci CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;"
+            "ALTER DATABASE shopdb_ci CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; \
+             ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'root'; \
+             FLUSH PRIVILEGES;"
       - name: Fresh core upgrade from empty
         run: flask db upgrade
       - name: Install every bundled plugin (runs its chain)