Two root causes behind #1516's remaining reports:
- A node whose Proxmox disks/list query fails (PVE probes SMART per disk
inside that call, so dozens of disks can exceed the API window) now
falls back to the linked host agent's smartctl inventory instead of
leaving the Physical Disks view empty. Each node also gets its own
attempt window so one slow node no longer starves the rest of the
cluster, and a poll that runs out of budget saves partial results.
- The -n standby probe guard is dropped for positively confirmed
non-rotational devices in both the host agent and the node sensor
wrapper. The guard exists to avoid spinning up sleeping HDDs; an SSD
has nothing to spin up, and some SATA SSDs answer CHECK POWER MODE
with a bogus standby state that permanently hid their temperature,
attributes and history.
Refs #1516
Tighten v5-to-v6 upgrade safety, release installability, provider MSP mode handling, AI cost accounting, metrics flushing, and frontend guardrails for the v6.0.0 GA candidate.
