Allow Devices to get FF Tables creds

[hardillb]

fixes #5920

Description

Adds Device tokens to the allowed list for FF Tables creds.

Related Issue(s)

#5920

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

Labels

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

[Steve-Mcl]

LGTM. Just waiting tests.

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 76.50%. Comparing base (2448555) to head (d665857).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
forge/ee/routes/tables/index.js	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5921      +/-   ##
==========================================
+ Coverage   76.49%   76.50%   +0.01%     
==========================================
  Files         370      370              
  Lines       18078    18082       +4     
  Branches     4222     4224       +2     
==========================================
+ Hits        13829    13834       +5     
+ Misses       4249     4248       -1     

Flag	Coverage Δ
backend	76.50% <75.00%> (+0.01%)	⬆️

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