chore: relocate backend into apps/api ahead of monorepo merge

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/api/models/users/user_bans.mdl.js

@@ -0,0 +1,41 @@
+/***********************************************************************************************************************************************************************
+ * File Name: user_bans.mdl.js
+ * Type of Program: Model
+ * Description: Sequelize model for the `user_bans` table.
+ *              Stores ban/unban audit records for policy enforcement actions.
+ *              Distinct from deactivation (account lifecycle) — bans track WHY,
+ *              WHO banned, duration, and lift history.
+ * Author: Kenneth Obsequio
+ * Date Created: Jun. 27, 2026
+ ***********************************************************************************************************************************************************************/
+const { DataTypes } = require('sequelize');
+const sequelize = require('../../config/db.config');
+const mdl_Users = require('./users.mdl');
+
+const mdl_UserBans = sequelize.define('UserBan', {
+  ban_id:     { type: DataTypes.BIGINT, primaryKey: true, autoIncrement: true },
+  user_id:    { type: DataTypes.BIGINT, allowNull: false, references: { model: mdl_Users, key: 'user_id' } },
+  banned_by:  { type: DataTypes.BIGINT, allowNull: false, references: { model: mdl_Users, key: 'user_id' } },
+
+  reason:     { type: DataTypes.TEXT, allowNull: false },
+  ban_type:   { type: DataTypes.ENUM('temporary', 'permanent'), allowNull: false },
+
+  banned_at:  { type: DataTypes.DATE, allowNull: false, defaultValue: DataTypes.NOW },
+  expires_at: { type: DataTypes.DATE, allowNull: true },
+
+  is_lifted:   { type: DataTypes.BOOLEAN, allowNull: false, defaultValue: false },
+  lifted_at:   { type: DataTypes.DATE,    allowNull: true },
+  lifted_by:   { type: DataTypes.BIGINT,  allowNull: true, references: { model: mdl_Users, key: 'user_id' } },
+  lift_reason: { type: DataTypes.TEXT,    allowNull: true },
+}, {
+  tableName: 'user_bans',
+  timestamps: true,
+});
+
+// ─── Associations ──────────────────────────────────────────────────────────────
+mdl_UserBans.belongsTo(mdl_Users, { as: 'user',   foreignKey: 'user_id'   });
+mdl_UserBans.belongsTo(mdl_Users, { as: 'banner', foreignKey: 'banned_by' });
+mdl_UserBans.belongsTo(mdl_Users, { as: 'lifter', foreignKey: 'lifted_by' });
+mdl_Users.hasMany(mdl_UserBans,   { as: 'bans',   foreignKey: 'user_id'   });
+
+module.exports = mdl_UserBans;