[17] Sentry Upgrade: v7 → v10

[n-lark]

Description

See details & test plan.

Blocker

⚠️ The following blocker is preventing full verification. Frontend integration has been confirmed via payload inspection but cannot be verified in the Sentry UI until this is resolved.

#	Blocker	Impact
1	Sentry quota exhausted — spans, transactions, and replays are being dropped by Sentry with "quota or internal rate limit reached". Quota resets at the start of the next billing period.	Cannot verify steps 7, 8, or any backend tracing in the Sentry UI

Related Issue(s)

Resolves https://github.com/FlowFuse/engineering/issues/17

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

[n-lark]

Sentry.init() is moved to before fastify() because Sentry v10 uses OpenTelemetry to instrument Node.js modules at startup. Calling it after fastify() meant those patches were never applied and errors weren't captured.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.28%. Comparing base (d2df691) to head (a9df9ba).

Files with missing lines	Patch %	Lines
forge/forge.js	55.55%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7017      +/-   ##
==========================================
+ Coverage   76.26%   76.28%   +0.02%     
==========================================
  Files         403      403              
  Lines       20312    20312              
  Branches     4886     4885       -1     
==========================================
+ Hits        15490    15495       +5     
+ Misses       4822     4817       -5     

Flag	Coverage Δ
backend	76.28% <66.66%> (+0.02%)	⬆️

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