Fix migration error: Use .all.group_by instead of .group_by on model class

The AddPositionToImageUploads migration was calling group_by directly on the ImageUpload class instead of on a collection. This fixes the NoMethodError by properly calling ImageUpload.all.group_by.

Also updates Gemfile.lock with arm64-darwin platform support after bundle install.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: drusepth

Gemfile.lock

@@ -1886,6 +1886,7 @@ GEM
     faye-websocket (0.11.3)
       eventmachine (>= 0.12.0)
       websocket-driver (>= 0.5.1)
+    ffi (1.17.2-arm64-darwin)
     ffi (1.17.2-x86_64-linux-gnu)
     ffi-compiler (1.3.2)
       ffi (>= 1.15.5)
@@ -1964,6 +1965,7 @@ GEM
       letter_opener (~> 1.9)
       railties (>= 6.1)
       rexml
+    libv8-node (16.19.0.1-arm64-darwin)
     libv8-node (16.19.0.1-x86_64-linux)
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
@@ -2019,6 +2021,8 @@ GEM
       net-protocol
     netrc (0.11.0)
     nio4r (2.7.4)
+    nokogiri (1.18.8-arm64-darwin)
+      racc (~> 1.4)
     nokogiri (1.18.8-x86_64-linux-gnu)
       racc (~> 1.4)
     observer (0.1.2)
@@ -2213,6 +2217,7 @@ GEM
       actionpack (>= 6.1)
       activesupport (>= 6.1)
       sprockets (>= 3.0.0)
+    sqlite3 (1.7.3-arm64-darwin)
     sqlite3 (1.7.3-x86_64-linux)
     stackprof (0.2.27)
     statsd-ruby (1.5.0)
@@ -2273,6 +2278,7 @@ GEM
     zeitwerk (2.7.2)
 
 PLATFORMS
+  arm64-darwin-24
   x86_64-linux
 
 DEPENDENCIES

db/migrate/20250626212442_add_position_to_image_uploads.rb

@@ -23,7 +23,7 @@ def change
         else
           # Database-agnostic approach using Ruby
           say_with_time("Backfilling positions for ImageUploads") do
-            ImageUpload.group_by { |img| [img.content_type, img.content_id] }.each do |group_key, images|
+            ImageUpload.all.group_by { |img| [img.content_type, img.content_id] }.each do |group_key, images|
               ordered_images = images.sort_by { |img| [img.created_at || Time.current, img.id] }
               ordered_images.each_with_index do |img, idx|
                 img.update_column(:position, idx + 1)