puppet node: redeclare to identical values is a notice not a warning.

[jcpunk]

Short description

On initial bootstrap my hosts have some issues getting all their classes and parameters sorted. This results in some silly looking logs.

puppetserver.log:2026-09-01T14:51:15.564-05:00 WARN  [qtp1853403919-973] [puppetserver] Puppet The node parameter 'slam_purpose' for node 'slam-monitoring-server' was already set to 'server'. It could not be set to 'server'

Since the resulting node parameter is already server, I'd suggest it isn't a WARNING so much as a NOTICE. Yeah, I should clean this up, but since there is no difference between what was set and what I tried to set, I'd rather log this at a lower severity.

Checklist

I have:

• read the CONTRIBUTING.md document
• read and accepted the Developer Certificate of Origin document and added a Signed-off-by annotation to each of my commits
• read and accepted the AI Policy document and added Generated-by or Assisted-by annotations to each of my commits created with the help of an AI agent
• tested this code
• included documentation (including possible behaviour changes)
• documented the code
• added or modified regression test(s)
• added or modified unit test(s)

[Sharpie]

Makes sense to me.