feat: close API coverage gaps — 51 new cmdlets across 6 areas

Phase 1 — Missing Update/Set operations (10 cmdlets):
- SDN: Set-PveSdnZone/Vnet/Subnet/Controller/Ipam/Dns + Invoke-PveSdnApply
- Set-PveRole, Set-PveStorage, Set-PveApiToken

Phase 2 — Cluster operations (8 cmdlets):
- Get-PveClusterResource (cluster-wide inventory)
- Get-PveTaskList, Stop-PveTask
- Get/New/Set/Remove-PvePool
- Get-PveBackupInfo (unprotected VMs)

Phase 3 — VM & container gaps (14 cmdlets):
- Move-PveVmDisk, Remove-PveVmDisk
- Guest agent: Get-PveVmGuestOsInfo/FsInfo, Read/Write-PveVmGuestFile,
  Set-PveVmGuestPassword, Invoke-PveVmGuestFsTrim
- Suspend/Resume-PveContainer, Resize-PveContainerDisk,
  New-PveContainerTemplate, Move-PveContainerVolume,
  Get-PveContainerInterface

Phase 4 — Storage content management (4 cmdlets):
- Get-PveStorageStatus, Remove/Set-PveStorageContent, New-PveStorageDisk

Phase 5 — Node operations (6 cmdlets):
- Get/Set-PveNodeConfig, Get/Set-PveNodeDns, Start/Stop-PveNodeVms

Phase 6 — Access management (9 cmdlets):
- Get/New/Set/Remove-PveGroup, Get/New/Set/Remove-PveDomain, Set-PvePassword

Total: 169 cmdlets (was 118). Includes models, services, format views,
Pester unit tests, manifest updates, README, CHANGELOG, API coverage docs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/PVE_API_COVERAGE.md

@@ -4,7 +4,7 @@ This document tracks which PVE API areas are implemented in PSProxmoxVE and whic
 
 **Last updated:** 2026-03-21
 **Module version:** 0.1.0-preview
-**Total cmdlets:** 110
+**Total cmdlets:** 169
 
 ## Implemented
 
@@ -27,12 +27,26 @@ This document tracks which PVE API areas are implemented in PSProxmoxVE and whic
 | **API Tokens** | 3 | `/access/users/{userid}/tokens/*` (CRUD) |
 | **Templates** | 4 | VM template conversion, listing, cloning, removal |
 | **Cloud-Init** | 3 | `/nodes/{node}/qemu/{vmid}/config` (cloud-init fields), `/nodes/{node}/qemu/{vmid}/cloudinit/regenerate` |
-| **Tasks** | 2 | `/nodes/{node}/tasks/{upid}/status` (get, wait) |
+| **Tasks** | 4 | `/nodes/{node}/tasks` (list, get status, stop, wait) |
 | **Firewall** | 21 | `/cluster/firewall/*`, `/nodes/{node}/firewall/*`, `/nodes/{node}/qemu/{vmid}/firewall/*`, `/nodes/{node}/lxc/{vmid}/firewall/*` (rules, groups, aliases, IP sets, options, refs) |
-| **Backup** | 5 | `/nodes/{node}/vzdump`, `/cluster/backup/*` (ad-hoc backup, scheduled job CRUD) |
-| **SDN IPAM** | 3 | `/cluster/sdn/ipams/*` (CRUD) |
-| **SDN DNS** | 3 | `/cluster/sdn/dns/*` (CRUD) |
-| **SDN Controllers** | 3 | `/cluster/sdn/controllers/*` (CRUD) |
+| **Backup** | 7 | `/nodes/{node}/vzdump`, `/cluster/backup/*`, `/cluster/backup-info/not-backed-up` |
+| **SDN Zones** | 4 | `/cluster/sdn/zones/*` (CRUD + update) |
+| **SDN VNets** | 4 | `/cluster/sdn/vnets/*` (CRUD + update) |
+| **SDN Subnets** | 4 | `/cluster/sdn/vnets/{vnet}/subnets/*` (CRUD + update) |
+| **SDN IPAM** | 4 | `/cluster/sdn/ipams/*` (CRUD + update) |
+| **SDN DNS** | 4 | `/cluster/sdn/dns/*` (CRUD + update) |
+| **SDN Controllers** | 4 | `/cluster/sdn/controllers/*` (CRUD + update) |
+| **SDN Apply** | 1 | `PUT /cluster/sdn` (apply pending changes) |
+| **Cluster** | 1 | `GET /cluster/resources` (cluster-wide inventory) |
+| **Pools** | 4 | `/pools/*` (CRUD) |
+| **VM Disk Ops** | 2 | `move_disk`, `unlink` |
+| **Guest Agent (ext)** | 6 | `get-osinfo`, `get-fsinfo`, `file-read`, `file-write`, `set-user-password`, `fstrim` |
+| **Container Ops** | 6 | `suspend`, `resume`, `resize`, `template`, `move_volume`, `interfaces` |
+| **Storage Content** | 4 | `status`, `content` DELETE/PUT/POST |
+| **Node Ops** | 6 | `config`, `dns`, `startall`, `stopall` |
+| **Access Groups** | 4 | `/access/groups/*` (CRUD) |
+| **Access Domains** | 4 | `/access/domains/*` (CRUD) |
+| **Access Password** | 1 | `PUT /access/password` |
 
 ## Not Yet Implemented
 
@@ -40,7 +54,6 @@ This document tracks which PVE API areas are implemented in PSProxmoxVE and whic
 
 | Area | Key Endpoints | Notes | Priority |
 |------|--------------|-------|----------|
-| **Pool Management** | `/pools/*` | Multi-tenant environments, resource grouping | Medium |
 
 ### Lower Priority Gaps