feat(server): add pdf template crud endpoints

packages/server/src/models/PdfTemplate.ts

@@ -0,0 +1,42 @@
+import TenantModel from 'models/TenantModel';
+
+export class PdfTemplate extends TenantModel {
+  /**
+   * Table name.
+   */
+  static get tableName() {
+    return 'pdf_templates';
+  }
+
+  /**
+   * Timestamps columns.
+   */
+  get timestamps() {
+    return ['createdAt', 'updatedAt'];
+  }
+
+  static get jsonSchema() {
+    return {
+      type: 'object',
+      properties: {
+        id: { type: 'integer' },
+        templateName: { type: 'string' },
+        attributes: { type: 'object' }, // JSON field definition
+      },
+    };
+  }
+
+  /**
+   * Virtual attributes.
+   */
+  static get virtualAttributes() {
+    return [];
+  }
+
+  /**
+   * Relationship mapping.
+   */
+  static get relationMappings() {
+    return {};
+  }
+}