Add featureinfo nested field for reporting feature specific metadata (#1367)

* feat: add featureinfo nested field for reporting feature specific metadata

* fix: make FeatureInfo start at 1

* generated protobuf

* fix: add missing changeset

* feat: migrate feature_info to a map<string, string>

* fix: remove optional on feature_info

* generated protobuf

---------

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

Author: 1egoman

.changeset/nice-tigers-attend.md

@@ -0,0 +1,6 @@
+---
+"github.com/livekit/protocol": patch
+"@livekit/protocol": patch
+---
+
+Add featureinfo nested field for reporting noise cancellation feature specific metadata

livekit/livekit_analytics.pb.go

@@ -241,8 +241,11 @@ message FeatureUsageInfo {
   string track_id = 7;
   // time ranges during which the feature was enabled.
   // for e. g., noise cancellation may not be applied when a media track is paused/muted,
-  // this allows reporting only periods during which a feature is avtive.
+  // this allows reporting only periods during which a feature is active.
   repeated TimeRange time_ranges = 8;
+
+  // Feature specific metadata included in the report
+  map<string, string> feature_info = 9;
 }
 
 message APICallRequest {