Feature/opentelemetry (#89)

* initial adds for otel tracing

* initial basic testing

* basic tracing for incoming calls

* linting

* add traceId to the webhook params

* trace webhook calls

* tracing: add new commands as tags when receiving async commands over websocket

* tracing new commands

* add summary for config verb

* trace async commands

* bugfix: undefined ref

* tracing: give time for final webhooks before closing root span

* tracing bugfix: span for background gather was not ended

* tracing - minor tag changes

* tracing - add span atttribute for reason call ended

* trace call status webhooks, add app version to trace output

* config: add support for automatically re-enabling

* env var to customize service name in tracing UI

* config: change to use 'sticky' attribute to re-enable bargein automatically

* fix warnings

* when adulting create a new root span

* when background gather triggers bargein via vad clear queue of tasks

* additional trace attributes for dial and refer

* fix dial tracing

* add better summary for dial

* fix prev commit

* add exponential backoff to WsRequestor reconnection logic

* add calling number to log metadata, as this will be frequently the key data given for troubleshooting

* add accountSid to log metadata

* make handshake timeout for ws connections configurable with default 1.5 secs

* rename env var

* fix bug prev checkin

* logging fixes

* consistent env naming

lib/session/call-info.js

@@ -10,6 +10,7 @@ class CallInfo {
     let from ;
     let srf;
     this.direction = opts.direction;
+    this.traceId = opts.traceId;
     if (opts.req) {
       const u = opts.req.getParsedHeader('from');
       const uri = parseUri(u.uri);
@@ -114,6 +115,7 @@ class CallInfo {
       callStatus: this.callStatus,
       callerId: this.callerId,
       accountSid: this.accountSid,
+      traceId: this.traceId,
       applicationSid: this.applicationSid,
       fsSipAddress: this.localSipAddress
     };