improv(metrics): emit warning when default dimensions are overwritten

[uttam282005]

Summary

Changes

This PR restores and improves the warning mechanism for overwritten default dimensions in the Metrics utility:

Key Updates:

• Introduced a static utility method suppressSetDefaultDimensionsWarnings() to temporarily suppress warnings during internal setDefaultDimensions() calls.
• Fixes a bug where calling captureColdStartMetric() would emit duplicate warnings for the service dimension.
• Refines warning behavior to only trigger when the overwritten service dimension is different from the internal default (i.e., truly user-defined).

Affected Code:

• metrics.ts (suppression logic added)
• dimension.test.ts (added tests covering the changes)
• captureColdStartMetric updated to wrap internal setDefaultDimensions call
• Constructor logic updated to avoid redundant warnings when values match

Issue number: closes #4134

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[dreamorosi]

I'll review this PR tomorrow, I am not 100% sure about wanting to add an internal flag but I need time to look at the code and come up with a proposal.

Please leave the PR open and, if possible, avoid making changes until we have time to review it.

Thank you!

[uttam282005]

sure.

[dreamorosi]

I need a bit more time - I've started looking at the PR and have made a couple commits to remove the static flag, but it needs some more work.

I'll continue by Monday end of day - please leave the PR open and if possible, avoid making changes to the code.

[dreamorosi]

@svozza I made a few commits to remove the workaround used to avoid the double warning, and refactored some of the internal logic to remove the root cause of the double warning.

The end to end tests are passing, if you can on Monday please take a look, since I'm the last committer I can't self-approve it.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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