Show UI warning to user when they need provider data but have not setup Synth yet (#1926)

* Simplify provider concerns

* Update tests

* Add UI warning for missing Synth key if family requires external data

app/models/concerns/providable.rb

@@ -1,35 +0,0 @@
-# `Providable` serves as an extension point for integrating multiple providers.
-# For an example of a multi-provider, multi-concept implementation,
-# see: https://github.com/maybe-finance/maybe/pull/561
-
-module Providable
-  extend ActiveSupport::Concern
-
-  class_methods do
-    def security_prices_provider
-      synth_provider
-    end
-
-    def security_info_provider
-      synth_provider
-    end
-
-    def exchange_rates_provider
-      synth_provider
-    end
-
-    def git_repository_provider
-      Provider::Github.new
-    end
-
-    def synth_provider
-      api_key = self_hosted? ? Setting.synth_api_key : ENV["SYNTH_API_KEY"]
-      api_key.present? ? Provider::Synth.new(api_key) : nil
-    end
-
-    private
-      def self_hosted?
-        Rails.application.config.app_mode.self_hosted?
-      end
-  end
-end

app/models/concerns/synthable.rb

@@ -0,0 +1,37 @@
+module Synthable
+  extend ActiveSupport::Concern
+
+  class_methods do
+    def synth_usage
+      synth_client&.usage
+    end
+
+    def synth_overage?
+      synth_usage&.usage&.utilization.to_i >= 100
+    end
+
+    def synth_healthy?
+      synth_client&.healthy?
+    end
+
+    def synth_client
+      api_key = ENV.fetch("SYNTH_API_KEY", Setting.synth_api_key)
+
+      return nil unless api_key.present?
+
+      Provider::Synth.new(api_key)
+    end
+  end
+
+  def synth_client
+    self.class.synth_client
+  end
+
+  def synth_usage
+    self.class.synth_usage
+  end
+
+  def synth_overage?
+    self.class.synth_overage?
+  end
+end