Conditionally include nr-assistant in device snapshots based on AI flag

[cstns]

Important

This PR is part of a nested merge list. Do not merge until its target branch is main.

Description

The @flowfuse/nr-assistant plugin was previously unconditionally included in device modules. It is now only included when AI is enabled at both platform and team level.

Changes in forge/routes/api/deviceLive.js:

• Starter snapshot (new devices): @flowfuse/nr-assistant is removed from the default modules when AI is disabled
• Existing snapshot injection (devices with target snapshots): @flowfuse/nr-assistant is conditionally injected when AI is enabled, and actively removed from snapshot modules when AI is disabled

Both locations check app.config.features.enabled('ai') && device.Team.getFeatureProperty('ai', true).

Note

Changes to the AI flag do not take effect on running devices immediately. Devices will pick up the updated module list on their next snapshot delivery (e.g. after a new deployment or device restart).

Related Issue(s)

closes #7313

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production
• Link to Changelog Entry PR, or note why one is not needed.

Labels

• Includes a DB migration? -> add the area:migration label

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.61%. Comparing base (62d5e70) to head (3e3a09c).

Additional details and impacted files

@@                                      Coverage Diff                                       @@
##           gate-all-ai-features-begind-ai-platform-and-team-type-flag    #7326      +/-   ##
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+ Coverage                                                       76.60%   76.61%   +0.01%     
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  Files                                                             405      405              
  Lines                                                           20621    20630       +9     
  Branches                                                         4998     5002       +4     
==============================================================================================
+ Hits                                                            15796    15805       +9     
  Misses                                                           4825     4825              

Flag	Coverage Δ
backend	76.61% <100.00%> (+0.01%)	⬆️

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