[DEV-5312] Use formatted time when logging events

src/system/StandardLogger.ts

@@ -24,7 +24,7 @@ import { PsrLogger, LogLevel } from './PsrLogger';
 
 declare type StructuredLog = {
     message:   string;
-    timestamp: UnixTimestamp;
+    timestamp: string;
     service:   string;
     env:       string;
     severity:  string;
@@ -181,9 +181,12 @@ export class StandardLogger implements PsrLogger
             str = msg;
         }
 
+        const ts          = this._ts_ctr();
+        const tsFormatted = new Date( ts * 1000 ).toISOString()
+
         const structured_log = <StructuredLog>{
             message:   str,
-            timestamp: this._ts_ctr(),
+            timestamp: tsFormatted,
             service:   'quote-server',
             env:       this._env,
             severity:  LogLevel[level],

test/system/EventMediatorTest.ts

@@ -26,7 +26,7 @@ import { expect } from 'chai';
 import { PsrLogger } from '../../src/system/PsrLogger';
 
 
-describe( 'system.EventLogger captures and logs events', () =>
+describe( 'system.EventMediator captures and logs events', () =>
 {
     it( 'document-processed triggers log#notice', () =>
     {

test/system/StandardLoggerTest.ts

@@ -30,7 +30,7 @@ declare interface MockConsole extends Console {
     getStr(): string,
 }
 
-describe( 'system.EventLogger captures and logs events', () =>
+describe( 'system.StandardLogger captures and logs events', () =>
 {
     it( 'debug triggers console output level: info', () =>
     {
@@ -139,7 +139,7 @@ describe( 'system.EventLogger captures and logs events', () =>
         const context = { bar: 'baz' };
         const expected_output = {
             message:   'Foo',
-            timestamp: 123123,
+            timestamp: '1970-01-02T10:12:03.000Z',
             service:   'quote-server',
             env:       'test',
             severity:  'NOTICE',