Resolve "Deprecate Providers package in favor of Worker"

pkg/pb/data_service/data_service.proto

@@ -18,6 +18,10 @@ message Identifier {
   string key = 1;
 }
 
+message Pattern {
+  string key = 2;
+}
+
 message Message {
   Identifier identifier = 1;
   bytes payload = 2;
@@ -29,7 +33,7 @@ message StartStreamResponse { string stream_uuid = 1; }
 
 message ConfigureStreamRequest {
   string stream_uuid = 1;
-  repeated Identifier identifiers = 2;
+  repeated Pattern patterns = 2;
 }
 message ConfigureStreamResponse {}