uploads: add ability to search your uploads by AI tags.

Add ability to search your unposted uploads using AI tags. Like with
media assets, only basic tags are supported (no metatags) and complex
multi-tag searches will probably be slow.

The default AI tag confidence threshold is 50%. There's a hidden
search[min_score] URL param that lets you change this.

app/models/upload.rb

@@ -87,16 +87,35 @@ class Upload < ApplicationRecord
     end
   end
 
+  def self.ai_tags_match(tag_string, score_range: (50..))
+    upload_media_assets = AITagQuery.search(tag_string, relation: UploadMediaAsset.all, foreign_key: :media_asset_id, score_range: score_range)
+    where(upload_media_assets.where("upload_media_assets.upload_id = uploads.id").arel.exists)
+  end
+
   def self.search(params)
     q = search_attributes(params, :id, :created_at, :updated_at, :source, :referer_url, :status, :media_asset_count, :uploader, :upload_media_assets, :media_assets, :posts)
 
+    if params[:ai_tags_match].present?
+      min_score = params.fetch(:min_score, 50).to_i
+      q = q.ai_tags_match(params[:ai_tags_match], score_range: (min_score..))
+    end
+
     if params[:is_posted].to_s.truthy?
       q = q.where.not(id: Upload.where.missing(:posts))
     elsif params[:is_posted].to_s.falsy?
       q = q.where(id: Upload.where.missing(:posts))
     end
 
-    q.apply_default_order(params)
+    case params[:order]
+    when "id", "id_desc"
+      q = q.order(id: :desc)
+    when "id_asc"
+      q = q.order(id: :asc)
+    else
+      q = q.apply_default_order(params)
+    end
+
+    q
   end
 
   def async_process_upload!