更改：项目排行榜使用数据存储以及数据导出的功能

db/migrate/20231219020521_create_daily_project_statistics.rb

@@ -0,0 +1,19 @@
+class CreateDailyProjectStatistics < ActiveRecord::Migration[5.2]
+  def change
+    create_table :daily_project_statistics do |t|
+      t.references :project
+      t.date :date
+      t.index :date 
+      t.integer :score, default: 0
+      t.integer :visits, default: 0 
+      t.integer :watchers, default: 0 
+      t.integer :praises, default: 0
+      t.integer :forks, default: 0
+      t.integer :issues, default: 0
+      t.integer :pullrequests, default: 0
+      t.integer :commits, default: 0
+
+      t.timestamps
+    end
+  end
+end