Mapping st-json/1 to OpenTelemetry (#136) leaves three rows lossy. In each, a consumer has to parse a display string:

1. error.type is the simple class name (NullPointerException). semconv exception.type wants the fully-qualified name.
2. error.culprit.frame is a display string, e.g. OrderService.confirm(OrderService.java:87). Getting code.function.name / code.line.number out of it means parsing.
3. env is one string (app=shop-api 1.4.2 (git 7e3c1f) | java 21 | profile=dev | linux). service.name, service.version and deployment.environment.name have to be split out of it.

Proposal, additive only (FORMAT.md §6, so no format bump; the schema is open and the new members are optional):

• error.typeName (FQN), next to error.type.
• error.culprit.className / methodName / fileName / lineNumber, using the same names as the repro.* members.
• envInfo: {app, version, gitSha, profile, java, os}, next to env.

Cost: JsonReportRenderer, the schema, the goldens, the drift test, and the §7 example. st/1 text is unchanged. Existing members are not renamed.