fix: send unifiedSessionId in the initial join request (#1934)

Provide the `unifiedSessionId` parameter in the initial SFU `JoinRequest`.
Ref: GetStream/protocol#1328

Author: oliverlaz

packages/client/src/Call.ts

@@ -981,6 +981,7 @@ export class Call {
           })
         : previousSfuClient;
     this.sfuClient = sfuClient;
+    this.unifiedSessionId ??= sfuClient.sessionId;
     this.dynascaleManager.setSfuClient(sfuClient);
 
     const clientDetails = await getClientDetails();
@@ -1008,6 +1009,7 @@ export class Call {
       try {
         const { callState, fastReconnectDeadlineSeconds, publishOptions } =
           await sfuClient.join({
+            unifiedSessionId: this.unifiedSessionId,
             subscriberSdp,
             publisherSdp,
             clientDetails,
@@ -1061,6 +1063,7 @@ export class Call {
         statsOptions,
         publishOptions: this.currentPublishOptions || [],
         closePreviousInstances: !performingMigration,
+        unifiedSessionId: this.unifiedSessionId,
       });
     }
 
@@ -1222,6 +1225,7 @@ export class Call {
     clientDetails: ClientDetails;
     publishOptions: PublishOption[];
     closePreviousInstances: boolean;
+    unifiedSessionId: string;
   }) => {
     const {
       sfuClient,
@@ -1230,6 +1234,7 @@ export class Call {
       statsOptions,
       publishOptions,
       closePreviousInstances,
+      unifiedSessionId,
     } = opts;
     const { enable_rtc_stats: enableTracing } = statsOptions;
     if (closePreviousInstances && this.subscriber) {
@@ -1288,7 +1293,6 @@ export class Call {
     this.tracer.setEnabled(enableTracing);
     this.sfuStatsReporter?.stop();
     if (statsOptions?.reporting_interval_ms > 0) {
-      this.unifiedSessionId ??= sfuClient.sessionId;
       this.sfuStatsReporter = new SfuStatsReporter(sfuClient, {
         clientDetails,
         options: statsOptions,
@@ -1298,7 +1302,7 @@ export class Call {
         camera: this.camera,
         state: this.state,
         tracer: this.tracer,
-        unifiedSessionId: this.unifiedSessionId,
+        unifiedSessionId,
       });
       this.sfuStatsReporter.start();
     }

packages/client/src/gen/video/sfu/event/events.ts

@@ -471,6 +471,14 @@ export interface JoinRequest {
    * @generated from protobuf field: string session_id = 2;
    */
   sessionId: string;
+  /**
+   * user_session id can change during reconnects, this helps us to
+   * identify the user across reconnects and should remain consistent until the user explicitly
+   * disconnects, is kicked or the call is ended.
+   *
+   * @generated from protobuf field: string unified_session_id = 13;
+   */
+  unifiedSessionId: string;
   /**
    * dumb SDP that allow us to extract subscriber's decode codecs
    *
@@ -1353,6 +1361,12 @@ class JoinRequest$Type extends MessageType<JoinRequest> {
     super('stream.video.sfu.event.JoinRequest', [
       { no: 1, name: 'token', kind: 'scalar', T: 9 /*ScalarType.STRING*/ },
       { no: 2, name: 'session_id', kind: 'scalar', T: 9 /*ScalarType.STRING*/ },
+      {
+        no: 13,
+        name: 'unified_session_id',
+        kind: 'scalar',
+        T: 9 /*ScalarType.STRING*/,
+      },
       {
         no: 3,
         name: 'subscriber_sdp',