Sanitise output of snapshot /export API

[Steve-Mcl]

Description

Enforce sanitised output by implementing view ProjectSnapshot.snapshotExport and applying it to the API.

NOTE: modules was removed from the schema as it is never populated (modules is a sub property of settings)

Related Issue(s)

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

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

[codecov]

Codecov Report

Attention: Patch coverage is 86.95652% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 41.71%. Comparing base (b7e13e5) to head (1b5958c).

Files	Patch %	Lines
forge/db/views/ProjectSnapshot.js	75.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3797   +/-   ##
=======================================
  Coverage   41.71%   41.71%           
=======================================
  Files         650      650           
  Lines       24801    24809    +8     
  Branches     6084     6091    +7     
=======================================
+ Hits        10345    10350    +5     
- Misses      14456    14459    +3     

Flag	Coverage Δ
backend	79.14% <90.90%> (-0.01%)	⬇️
frontend	1.88% <0.00%> (-0.01%)	⬇️

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