Improvements on wallet-service opentelemetry

[andreabadesso]

For me this is approved, I just have some questions:

Storage costs. Traces generate significant data volume. Without sampling, costs can grow quickly. Tail-based sampling mitigates this but adds collector complexity.

Do we have an estimation on how much this will increase?

ADOT layer cold start impact in our specific Lambdas. The 200-800ms range is from AWS documentation. We need to benchmark with our actual deployment packages to get exact numbers.

We should implement this feature with a simple feature flag (even if it's an ENV var) to turn it off in a simple way, if we feel it's adding lot of overhead, not only to the cold start.

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Would be amazing to have an analysis for each alert created for the alert manager on how to improve the query/API/error being alerted.

Originally posted by @pedroferreira1 in #105 (review)