test(trace): add unit test suite for span attribute key naming and primitive value validation

[gcoinstash-cmd]

Summary

Adds standalone unit tests verifying OpenTelemetry span attribute key string formatting:

• Validates alphanumeric character hierarchy separated by dots.
• Asserts attribute value type acceptance for primitive types (str, int, float, bool).

[linux-foundation-easycla]

• ✅ login: herin049 / name: Lukas Hering (36a1ccf)
• ❌ - login: @gcoinstash-cmd / name: gcoinstash-cmd. The commit (3f90b11) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please visit our EasyCLA portal and chat with our support bot.

[opentelemetry-pr-dashboard]

Pull request dashboard status

Waiting on the author · refreshed 2026-09-14 01:09 UTC

Investigate required status check failures.

Status above doesn't look right?

• Just replied or pushed? Anything around or after the refresh time above may not be picked up yet — give it a few minutes.
• Should this be with reviewers? Comment /dashboard route:reviewers to route it to them.
• Anything wrong — including the routing? Report it with what you expected; it helps us improve the dashboard.

[herin049]

I don't understand the purpose of this PR, it's not testing any behavior in the API/SDK.

[Shriprasad-P]

Appreciate the change. From a first pass this looks focused; a green CI run would be the main gate from my side.