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>

server/phy-srv-gpu01/README.md

@@ -0,0 +1,31 @@
+# phy-srv-gpu01
+
+GPU server for AI/ML workloads. Hardware is ordered/assessed; OS setup and configuration are the next step.
+
+| | |
+| - | - |
+| IP | 192.168.66.69 (planned) |
+| Ansible group | `phy_srv_gpu01` |
+| Status | planned — not yet configured |
+
+## Hardware
+
+HPE ProLiant DL380 Gen12, 2× Intel Xeon 6714P (8-core, 4.0 GHz), 128 GB RAM,
+NVIDIA RTX PRO 6000 96 GB, 2× 960 GB NVMe SSD, redundant PSU — full BOM in [HW.md](HW.md).
+
+## Planning notes
+
+- [Hardware assessment (2026-07-06)](notes/20260706-hardware-assessment.md)
+- [Software assessment (2026-07-06)](notes/20260706-software-assessment.md)
+- [Deep dive (2026-07-07)](notes/20260707-deep-dive.md)
+- [Project plan for the setup (2026-07-10)](notes/20260710-projektplan.md) — start here when the server arrives
+
+Open pre-work items are tracked in the repo-root [TODO.md](../../TODO.md).
+
+## Runbooks
+
+- [NVIDIA driver, CUDA repo & container toolkit (2026-07-14)](manuals/20260714-nvidia-driver-install.md) — automated by the Ansible role `nvidia_gpu`
+
+## Scripts
+
+- [share-analysis.ps1](scripts/share-analysis.ps1) — read-only SMB share analysis (projektplan §2.1); run on a Windows machine with read access to the shares