alot more changes

instrumentation.md

@@ -139,6 +139,7 @@ stack, while `file=@...` reads the local source-map file contents:
 
 ```sh
 curl --fail-with-body --silent --show-error \
+  -H "X-Sourcemap-Key: $OTEL_SOURCEMAP_KEY" \
   -X POST "https://otel.example.com/api/sourcemaps" \
   -F "release=$RELEASE" \
   -F "source=/assets/app-HASH.js" \