Error Analysis: expose serviceName in list responses

[feelform]

The exceptiontrace storage stores serviceName per row and every Error Analysis query filters by it, but the response views (ExceptionDetailView) do not expose the field. Rows returned by /api/errors/errorList therefore cannot say which service they belong to, and the error detail view falls back to the screen's service when opening a row (#14187).

Expose serviceName in the response views so consumers pass the row's own service through, the same way errorKey does for call tree rows.

Tasks:

• Add serviceName to ExceptionDetailView and the mapper's selected columns
• Add serviceName to the frontend ErrorAnalysisErrorList.ErrorData type and pass it to the detail query
• Make ErrorAnalysisTransactionInfo.Parameters.serviceName required (missing values default to DEFAULT) and drop the screen-service fallback in the detail fetcher

Starting points:

• exceptiontrace/exceptiontrace-web/.../view/ExceptionDetailView.java
• exceptiontrace/exceptiontrace-web/src/main/resources/exceptiontrace/mapper/ExceptionMetadataMapper.xml — selected columns
• web-frontend/.../constants/types/ErrorAnalysisErrorList.ts, ErrorAnalysisErrorDetailFetcher.tsx — the screen-service fallback this removes in practice