Inconsistent Attributes key behaviour between otel4s and oteljava

[NthPortal]

otel4s allows multiple Attributes with the same name but different types in an Attributes collection; oteljava on the other hand does not, and I suspect that they are spec compliant.

[iRevive]

Indeed.

println(
  JAttributes.of(
    JAttributeKey.longKey("key"), Long.box(123L),
    JAttributeKey.doubleKey("key"), Double.box(123.0)
  )
)
// {key=123.0}

The keys, however, are distinguished:

JAttributeKey.longKey("key") == JAttributeKey.longKey("key") // true
JAttributeKey.longKey("key") == JAttributeKey.doubleKey("key") // false

So we should update only Attributes builder.