Don't resend profiles if IdP values do not change (41239)

[juan-fdz-hawa]

Related issue: Resolves #41239

Checklist for submitter

PUT /hosts/{id}/device_mapping should only trigger a resend of profiles when the IdP value changes.

If some of the following don't apply, delete the relevant line.

• Changes file added for user-visible changes in changes/, orbit/changes/ or ee/fleetd-chrome/changes.
  See Changes files for more information.

Testing

• Added/updated automated tests
• QA'd all new/changed functionality manually

[juan-fdz-hawa]

@coderabbitai full review

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.36%. Comparing base (9424db4) to head (dbd3a61).
⚠️ Report is 20 commits behind head on main.

Files with missing lines	Patch %	Lines
server/service/hosts.go	66.66%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #41662   +/-   ##
=======================================
  Coverage   66.36%   66.36%           
=======================================
  Files        2492     2492           
  Lines      199553   199633   +80     
  Branches     8977     8977           
=======================================
+ Hits       132430   132495   +65     
- Misses      55155    55162    +7     
- Partials    11968    11976    +8     

Flag	Coverage Δ
backend	68.17% <66.66%> (+<0.01%)	⬆️

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