case 4757 - manual revision stamp and copyright year set automatically when the manuals are built

A MkDocs hook (docs/8.0/rev_date.py), used by both manuals, replaces REV-AUTO
and YEAR-AUTO in the copyright line with the date of the last commit that
changed that manual, or today if it has uncommitted changes or git is not
available. A missing placeholder fails the strict build. The customer manual's
stamp had not been updated since 2022. The home page sentence about the stamp
no longer reads like a placeholder. Release procedure step 2, the docs
Dockerfile usage lines and .gitignore (__pycache__) follow.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/8.0/customer/mkdocs.yml

@@ -8,7 +8,10 @@ theme:
 site_name: AyaNova Customer user manual
 site_dir: '../../../server/AyaNova/wwwroot/cust'
 strict: true
-copyright: Copyright © 2022 Ground Zero Tech-Works Inc. REV-2022-07-18
+# YEAR-AUTO and REV-AUTO are set when the manual is built (../rev_date.py)
+copyright: Copyright © 2022-YEAR-AUTO Ground Zero Tech-Works Inc. REV-AUTO
+hooks:
+  - ../rev_date.py
 extra:  
   generator: false 
 # Extensions