feat: Normalized server logging (#2567)

* feat: Normalize logging

* Remove scattered console.error + Sentry.captureException

* Remove mention of debug

* cleanup dev output

* Edge cases, docs

* Refactor: Move logger, metrics, sentry under 'logging' folder.
Trying to reduce the amount of things under generic 'utils'

* cleanup, last few console calls

server/collaboration/tracing.js

@@ -1,40 +1,40 @@
 // @flow
-import * as metrics from "../utils/metrics";
+import Metrics from "../logging/metrics";
 
 let count = 0;
 
 export default class Tracing {
   async onCreateDocument({ documentName }: { documentName: string }) {
-    metrics.increment("collaboration.create_document", { documentName });
+    Metrics.increment("collaboration.create_document", { documentName });
 
     // TODO: Waiting for `instance` available in payload
-    // metrics.gaugePerInstance(
+    // Metrics.gaugePerInstance(
     //   "collaboration.documents_count",
     //   instance.documents.size()
     // );
   }
 
   async onAuthenticationFailed({ documentName }: { documentName: string }) {
-    metrics.increment("collaboration.authentication_failed", { documentName });
+    Metrics.increment("collaboration.authentication_failed", { documentName });
   }
 
   async onConnect({ documentName }: { documentName: string }) {
-    metrics.increment("collaboration.connect", { documentName });
-    metrics.gaugePerInstance("collaboration.connections_count", ++count);
+    Metrics.increment("collaboration.connect", { documentName });
+    Metrics.gaugePerInstance("collaboration.connections_count", ++count);
   }
 
   async onDisconnect({ documentName }: { documentName: string }) {
-    metrics.increment("collaboration.disconnect", { documentName });
-    metrics.gaugePerInstance("collaboration.connections_count", --count);
+    Metrics.increment("collaboration.disconnect", { documentName });
+    Metrics.gaugePerInstance("collaboration.connections_count", --count);
 
     // TODO: Waiting for `instance` available in payload
-    // metrics.gaugePerInstance(
+    // Metrics.gaugePerInstance(
     //   "collaboration.documents_count",
     //   instance.documents.size()
     // );
   }
 
   async onChange({ documentName }: { documentName: string }) {
-    metrics.increment("collaboration.change", { documentName });
+    Metrics.increment("collaboration.change", { documentName });
   }
 }