feat: complete MongoDB to CouchDB migration

- Migrate Report model to CouchDB with embedded street/user data
- Migrate UserBadge model to CouchDB with badge population
- Update all remaining routes (reports, users, badges, payments) to use CouchDB
- Add CouchDB health check and graceful shutdown to server.js
- Add missing methods to couchdbService (checkConnection, findWithPagination, etc.)
- Update Kubernetes deployment manifests for CouchDB support
- Add comprehensive CouchDB setup documentation

All core functionality now uses CouchDB as primary database while maintaining
MongoDB for backward compatibility during transition period.

🤖 Generated with [AI Assistant]

Co-Authored-By: AI Assistant <noreply@ai-assistant.com>

backend/routes/users.js

@@ -1,5 +1,6 @@
 const express = require("express");
 const User = require("../models/User");
+const Street = require("../models/Street");
 const auth = require("../middleware/auth");
 const { asyncHandler } = require("../middleware/errorHandler");
 const { userIdValidation } = require("../middleware/validators/userValidator");
@@ -14,11 +15,34 @@ router.get(
   auth,
   userIdValidation,
   asyncHandler(async (req, res) => {
-    const user = await User.findById(req.params.id).populate("adoptedStreets");
+    const user = await User.findById(req.params.id);
     if (!user) {
       return res.status(404).json({ msg: "User not found" });
     }
-    res.json(user);
+
+    // Get adopted streets data
+    let adoptedStreets = [];
+    if (user.adoptedStreets && user.adoptedStreets.length > 0) {
+      adoptedStreets = await Promise.all(
+        user.adoptedStreets.map(async (streetId) => {
+          const street = await Street.findById(streetId);
+          return street ? {
+            _id: street._id,
+            name: street.name,
+            location: street.location,
+            status: street.status,
+          } : null;
+        })
+      );
+      adoptedStreets = adoptedStreets.filter(Boolean);
+    }
+
+    const userWithStreets = {
+      ...user,
+      adoptedStreets,
+    };
+
+    res.json(userWithStreets);
   }),
 );
 
@@ -50,13 +74,14 @@ router.post(
     );
 
     // Update user with new profile picture
-    user.profilePicture = result.url;
-    user.cloudinaryPublicId = result.publicId;
-    await user.save();
+    const updatedUser = await User.update(req.user.id, {
+      profilePicture: result.url,
+      cloudinaryPublicId: result.publicId,
+    });
 
     res.json({
       msg: "Profile picture updated successfully",
-      profilePicture: user.profilePicture,
+      profilePicture: updatedUser.profilePicture,
     });
   }),
 );
@@ -79,9 +104,10 @@ router.delete(
     await deleteImage(user.cloudinaryPublicId);
 
     // Remove from user
-    user.profilePicture = undefined;
-    user.cloudinaryPublicId = undefined;
-    await user.save();
+    await User.update(req.user.id, {
+      profilePicture: undefined,
+      cloudinaryPublicId: undefined,
+    });
 
     res.json({ msg: "Profile picture deleted successfully" });
   }),