add to index, add appendix

Author: Swatinem

README.md

@@ -35,3 +35,4 @@ This repository contains RFCs and DACIs. Lost?
 - [0070-document-sensitive-data-collected](text/0070-document-sensitive-data-collected.md): Document sensitive data collected
 - [0071-continue-trace-over-process-boundaries](text/0071-continue-trace-over-process-boundaries.md): Continue trace over process boundaries
 - [0072-kafka-schema-registry](text/0072-kafka-schema-registry.md): Kafka Schema Registry
+- [0081-sourcemap-debugid](text/0081-sourcemap-debugid.md): Reliable JavaScript/SourceMap lookup via `DebugId`

text/0081-sourcemap-debugid.md

@@ -215,3 +215,12 @@ multiple options are presented.
 
 - Why do we call the new SourceMap field `debug_id` and not `debugId`?
   All existing fields in SourceMaps are camelCase, and so is the general convention in the JS ecosystem.
+
+---
+
+# Appendix
+
+## What is an `ArtifactBundle`
+
+TODO: explain what it is
+TODO: why do we want to have as little (preferably 1) for each event