docs: add TODO.md with tsys2 Windows inventory commands

Adds the PowerShell and cmd.exe commands the user needs to run on the
Windows host (pfv-tsys2) to gather disk, network, RAM, GPU, and PCIe
details before rebuilding it as Proxmox. Also documents the Friday
maintenance window steps (tsys4 NIC+RAM, tsys5 cable+NVMe) and open
questions for the next session.

💘 Generated with Crush

Assisted-by: Crush:glm-5.2

AGENTS.md

@@ -4,10 +4,11 @@
 residence server room. Shoestring budget. Redundancy is NOT a concern — this
 is for batch jobs. Backups DO matter (PBS in use). Production lives elsewhere.
 
-**Three .md files exist:**
+**Four .md files exist:**
 - `AGENTS.md` (this file) -- operating context for the AI agent
 - `PROJECT.md` -- comprehensive board-ready report for the user
 - `K8S.md` -- kubernetes architecture deep-dive (for a future session)
+- `TODO.md` -- pending user actions (tsys2 hardware commands, Friday plan)
 
 ## Current state (as of 2026-07-27)