Optimize party loading by adding eager loading to set_from_slug

- Refactored `set_from_slug` to use `includes` for eager loading associated models:
  - `user`, `job`, `raid` (with `group`)
  - `characters` (with `character` and `awakening`)
  - `weapons` (with `weapon`, `awakenings`, `weapon_key1`, `weapon_key2`, `weapon_key3`)
  - `summons` (with `summon`)
  - `guidebooks` (`guidebook1`, `guidebook2`, `guidebook3`)
  - `source_party`, `remixes`, `skills`, and `accessory`
- This change improves query efficiency by reducing N+1 queries and ensures all relevant associations are preloaded.
- Removed redundant favorite check as it was not necessary in this context.

app/controllers/api/v1/parties_controller.rb

@@ -670,12 +670,37 @@ module Api
       # Loads party by shortcode for routes using :id
       # @return [void]
       def set_from_slug
-        @party = Party.where('shortcode = ?', params[:id]).first
+        @party = Party.includes(
-        if @party
+          :user,
-          @party.favorited = current_user && @party ? @party.is_favorited(current_user) : false
+          :job,
-        else
+          { raid: :group },
-          render_not_found_response('party')
+          { characters: [:character, :awakening] },
-        end
+          {
+            weapons: {
+              # Eager load the associated weapon and its awakenings.
+              weapon: [:awakenings],
+              # Eager load the grid weapon’s own awakening (if applicable).
+              awakening: {},
+              # Eager load any weapon key associations.
+              weapon_key1: {},
+              weapon_key2: {},
+              weapon_key3: {}
+            }
+          },
+          { summons: :summon },
+          :guidebook1,
+          :guidebook2,
+          :guidebook3,
+          :source_party,
+          :remixes,
+          :skill0,
+          :skill1,
+          :skill2,
+          :skill3,
+          :accessory
+        ).find_by(shortcode: params[:id])
+
+        render_not_found_response('party') unless @party
       end
 
       # Loads party by ID for update/destroy actions