Basic auth (username/password) has been supported since the plugin's
origin but TrueNAS API keys have been available since TrueNAS 12 (2020).
Sending credentials on every API call is a security risk and TrueNAS
may stop accepting it in future releases.
Log a syslog(warn) on every connection attempt that uses Basic Auth so
operators see the deprecation message in their Proxmox logs. The warning
links to issue #244 which tracks removal in v3.0.0.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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