Rename phy-z-srv-gpu01 to phy-srv-gpu01; fix share analysis scripts

- rename host/group/folder everywhere to match the server's actual
  hostname and physical label
- share-analysis.ps1: sanitize the output filename prefix — '-Paths "D:"'
  produced 'D:-file-types.csv' and Export-Csv failed with 'path format
  not supported', so no CSVs were written
- share-analysis.ps1: new -FolderDepth so folders can be aggregated at
  D:\Abteilungen\<Share> level, which matches the share layout
- list-shares.ps1: -WithSize walks local paths instead of UNC when run on
  the server itself (UNC was orders of magnitude slower and looked stuck)
  and prints progress every 50k files

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

ansible/run.yml

@@ -69,7 +69,7 @@
       tags: base
 
 
-- hosts: phy_z_srv_gpu01
+- hosts: phy_srv_gpu01
   become: yes
   vars_files:
     - "group_vars/secrets.yml"