Docs: rewrap the identity lines; M6.3 names only today's directory

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J5Utyfzw7gF7UhjRDEtjTk

docs/Architecture.md

@@ -555,9 +555,9 @@ can do rather than trying to prevent steering.
 - **Only credentials are secrets;** every other setting is reviewable
   configuration.
 
-**Identity:** each agent is its own Samba AD principal in a tightly scoped Authelia
-group, never the operator's account, with its own account and token in each
-service it uses (X5).
+**Identity:** each agent is its own Samba AD principal in a tightly scoped
+Authelia group, never the operator's account, with its own account and token in
+each service it uses (X5).
 
 **Logging:** structured JSON lines to the host journal and the log stack. Every
 durable state change emits exactly one line, with a fixed envelope (time, agent,