Optimisations and updated readme

src/data/templates.js

@@ -19,7 +19,7 @@ async function fetchTemplateById(pool, id) {
     return null;
   }
   const template = templates[0];
-  const [regions] = await pool.query('SELECT * FROM slide_template_regions WHERE template_id = ? ORDER BY z_index ASC, id ASC', [id]);
+  const [regions] = await pool.query('SELECT id, template_id, region_key, region_type, label, font_family, x, y, width, height, z_index, created_at, modified_at, created_by, modified_by FROM slide_template_regions WHERE template_id = ? ORDER BY z_index ASC, id ASC', [id]);
   template.regions = regions;
   return template;
 }
@@ -32,7 +32,7 @@ async function fetchTemplatesData(pool) {
     LEFT JOIN canvas_sizes cs ON cs.id = st.canvas_size_id
     ORDER BY st.id DESC
   `);
-  const [templateRegions] = await pool.query('SELECT * FROM slide_template_regions ORDER BY template_id ASC, z_index ASC, id ASC');
+  const [templateRegions] = await pool.query('SELECT id, template_id, region_key, region_type, label, font_family, x, y, width, height, z_index, created_at, modified_at, created_by, modified_by FROM slide_template_regions ORDER BY template_id ASC, z_index ASC, id ASC');
   return { templates, templateRegions };
 }
 
@@ -118,7 +118,7 @@ async function buildTemplatePayload(pool, req, existingTemplate) {
 
   let resolvedCanvasSizeId = canvasSizeId;
   if (resolvedCanvasSizeId) {
-    const [canvasSizes] = await pool.query('SELECT * FROM canvas_sizes WHERE id = ?', [resolvedCanvasSizeId]);
+    const [canvasSizes] = await pool.query('SELECT id, name, width, height, created_at, modified_at, created_by, modified_by FROM canvas_sizes WHERE id = ?', [resolvedCanvasSizeId]);
     const canvasSize = canvasSizes[0];
     if (!canvasSize) {
       const error = new Error('Canvas size not found.');