chore: Update default ping endpoint

[ppawlowski]

Description

This pull request updates the default PING endpoint from ping.flowforge.com to ping.flowfuse.com. Update includes code and documentation changes.

Related Issue(s)

Closes https://github.com/FlowFuse/engineering/issues/332

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

[hardillb]

My only worry about making this change is for Self Hosted customers who have opened up access based on hostname, They would probably need to be doing deep packet inspection to notice the change as both hostnames should resolve to the same IP addresses (I assume?).

[ppawlowski]

both hostnames should resolve to the same IP addresses

They point to the same AWS API Gateway but resolve to a different CNAME, thus different IP addresses:

$ dig ping.flowforge.com +short
d-8z6aumeey1.execute-api.eu-west-1.amazonaws.com.
18.200.173.105
52.31.172.32 

$ dig ping.flowfuse.com +short
d-7qw1izy8jd.execute-api.eu-west-1.amazonaws.com.
54.246.230.239
34.241.211.205

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 77.42%. Comparing base (d271eb9) to head (340fa0d).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
forge/housekeeper/tasks/telemetryMetrics.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8657   +/-   ##
=======================================
  Coverage   77.42%   77.42%           
=======================================
  Files         469      469           
  Lines       25346    25346           
  Branches     6751     6751           
=======================================
  Hits        19624    19624           
  Misses       5722     5722           

Flag	Coverage Δ
backend	77.42% <0.00%> (ø)

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