Replace single-version fixture with per-version specs from pve-api.
Tests now validate enum values against PVE 7 (best-effort), 8, and 9.
Key findings from version-specific specs:
- VM.Monitor: valid in PVE 7+8, removed in PVE 9
- VM.Replicate: added in PVE 9 only
- VM.GuestAgent.*: added in PVE 9 only
- Mapping.*: added in PVE 8+
- glusterfs: not in any version (removed before PVE 7)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Clint Branham