Merged PR 446: DBマイグレーション

## 概要
[Task2733: DBマイグレーション](https://paruru.nds-tyo.co.jp:8443/tfs/ReciproCollection/fa4924a4-d079-4fab-9fb5-a9a11eb205f0/_workitems/edit/2733)

- 以下のテーブルを追加するマイグレーションファイルを追加しました。
  - ワークフローテーブル
  - ルーティング候補テーブル

## レビューポイント
- テーブル名、カラム名は適切か
- 外部キー制約は適切か

## UIの変更
- なし

## 動作確認状況
- ローカルで確認
  - migurate up/down

dictation_server/db/migrations/041_create_workflow.sql

@@ -0,0 +1,44 @@
+-- +migrate Up
+CREATE TABLE IF NOT EXISTS `workflows` (
+	`id` BIGINT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY COMMENT 'workflowの内部ID',
+	`account_id` BIGINT UNSIGNED NOT NULL COMMENT 'アカウントID',
+	`author_id` BIGINT UNSIGNED NOT NULL COMMENT 'authorユーザーの内部ID',	
+	`worktype_id`BIGINT UNSIGNED COMMENT 'Worktypeの内部ID',
+	`template_id` BIGINT UNSIGNED COMMENT 'テンプレートファイルの内部ID',
+	`created_by` VARCHAR(255) COMMENT '作成者',
+	`created_at` TIMESTAMP DEFAULT now() COMMENT '作成時刻',
+	`updated_by` VARCHAR(255) COMMENT '更新者',
+	`updated_at` TIMESTAMP DEFAULT now() on UPDATE now() COMMENT '更新時刻',
+	UNIQUE worktype_id_index (account_id, author_id, worktype_id),
+	CONSTRAINT `workflows_fk_account_id` FOREIGN KEY (account_id) REFERENCES accounts(id) ON DELETE CASCADE, 
+	CONSTRAINT `workflows_fk_author_id` FOREIGN KEY (author_id) REFERENCES users(id),
+	CONSTRAINT `workflows_fk_worktype_id` FOREIGN KEY (worktype_id) REFERENCES worktypes(id),
+	CONSTRAINT `workflows_fk_template_id` FOREIGN KEY (template_id) REFERENCES template_files(id)
+) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci;
+
+CREATE TABLE IF NOT EXISTS `workflow_typists` (
+	`id` BIGINT UNSIGNED AUTO_INCREMENT NOT NULL PRIMARY KEY COMMENT 'worktypeの内部ID',
+	`workflow_id` BIGINT UNSIGNED NOT NULL COMMENT 'workflowの内部ID',
+	`typist_id` BIGINT UNSIGNED COMMENT 'タイピストユーザーの内部ID',
+	`typist_group_id` BIGINT UNSIGNED COMMENT 'タイピストグループの内部ID',
+	`created_by` VARCHAR(255) COMMENT '作成者',
+	`created_at` TIMESTAMP DEFAULT now() COMMENT '作成時刻',
+	`updated_by` VARCHAR(255) COMMENT '更新者',
+	`updated_at` TIMESTAMP DEFAULT now() on UPDATE now() COMMENT '更新時刻',
+	CONSTRAINT `workflow_typists_fk_workflow_id` FOREIGN KEY (workflow_id) REFERENCES workflows(id) ON DELETE CASCADE,
+	CONSTRAINT `workflow_typists_fk_typist_id` FOREIGN KEY (typist_id) REFERENCES users(id),
+	CONSTRAINT `workflow_typists_fk_typist_group_id` FOREIGN KEY (typist_group_id) REFERENCES user_group(id)
+) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci;
+
+
+
+-- +migrate Down
+ALTER TABLE `workflows` DROP FOREIGN KEY `workflows_fk_account_id`;
+ALTER TABLE `workflows` DROP FOREIGN KEY `workflows_fk_author_id`;
+ALTER TABLE `workflows` DROP FOREIGN KEY `workflows_fk_worktype_id`;
+ALTER TABLE `workflows` DROP FOREIGN KEY `workflows_fk_template_id`;
+ALTER TABLE `workflow_typists` DROP FOREIGN KEY `workflow_typists_fk_workflow_id`;
+ALTER TABLE `workflow_typists` DROP FOREIGN KEY `workflow_typists_fk_typist_id`;
+ALTER TABLE `workflow_typists` DROP FOREIGN KEY `workflow_typists_fk_typist_group_id`;
+DROP TABLE IF EXISTS `workflows`;
+DROP TABLE IF EXISTS `workflow_typists`;