feat(log): init module trace and add data model

modules/traces/client/traces.client.module.js

@@ -0,0 +1,9 @@
+(function (app) {
+  'use strict';
+
+  app.registerModule('traces', ['core']);// The core module is required for special route handling; see /core/client/config/core.client.routes
+  app.registerModule('traces.admin', ['core.admin']);
+  app.registerModule('traces.admin.routes', ['core.admin.routes']);
+  app.registerModule('traces.services');
+  app.registerModule('traces.routes', ['ui.router', 'core.routes', 'traces.services']);
+}(ApplicationConfiguration));

modules/traces/server/models/trace.server.model.js

@@ -0,0 +1,24 @@
+'use strict';
+
+/**
+ * Module dependencies
+ */
+var mongoose = require('mongoose'),
+  Schema = mongoose.Schema;
+
+/**
+ * Log Schema
+ */
+var TraceSchema = new Schema({
+  from_user: {
+    type: Schema.Types.ObjectId,
+    ref: 'User'
+  },
+  content: Object,  //log json object
+  createdat: {
+    type: Date,
+    default: Date.now
+  }
+});
+
+mongoose.model('Trace', TraceSchema);