Reduce media bandwidth: compress uploads, add long-lived cache headers, gzip API

- Resize/re-encode every uploaded image server-side (posts, avatars, stories,
  shop products/logo, chat messages) via a shared sharp-based optimizer —
  caps dimensions to what's actually displayed and re-compresses in place,
  cutting a typical raw camera photo by ~90% with no visible quality loss
- Cap uploaded video resolution/bitrate (re-encode only when above 1280px/
  ~2.5Mbps) alongside the existing faststart step; apply faststart+cap to
  story and chat videos too (previously stored completely raw)
- Add long-lived Cache-Control to all /storage static routes so clients stop
  re-downloading unchanged media on every request
- Add gzip/brotli compression for JSON API responses (feed/explore/chat)

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

controllers/application/verify/setProfileImageController.js

@@ -3,6 +3,11 @@ const fs = require('fs-extra')
 const path = require('path')
 const UserModel = require('../../../models/UserModel')
 const jwt = require('jsonwebtoken')
+const { optimizeImageFile } = require('../../../utils/imageOptimize')
+
+// آواتار هیچ‌وقت بزرگ‌تر از این نمایش داده نمی‌شود — عکسِ خامِ دوربین (چند مگابایت) رو
+// برای یه دایره‌ی کوچیک نگه‌داشتن فقط مصرفِ اینترنت رو بالا می‌بره
+const AVATAR_MAX_DIMENSION = 800
 
 const setProfileImage = async (req, res, next) => {
   try {
@@ -34,6 +39,7 @@ const setProfileImage = async (req, res, next) => {
     const filePath = path.join(uploadDir, uniqueFileName)
 
     await fs.move(profile_image.path, filePath)
+    await optimizeImageFile(filePath, { maxDimension: AVATAR_MAX_DIMENSION })
     // ذخیره مسیر فایل در دیتابیس
     user.profile_image = `/profiles/${uniqueFileName}`
     await user.save()
@@ -81,6 +87,7 @@ const updateProfileImage = async (req, res, next) => {
     const filePath = path.join(uploadDir, uniqueFileName)
 
     await fs.move(profile_image.path, filePath)
+    await optimizeImageFile(filePath, { maxDimension: AVATAR_MAX_DIMENSION })
 
     user.profile_image = `/profiles/${uniqueFileName}`
     await user.save()