Add Budget#valuating_or_later? method

We're going to use it so we know if a budget has finished its support
phase.

app/models/budget.rb

@@ -125,6 +125,10 @@ class Budget < ApplicationRecord
     Budget::Phase::PUBLISHED_PRICES_PHASES.include?(phase)
   end
 
+  def valuating_or_later?
+    current_phase&.valuating_or_later?
+  end
+
   def publishing_prices_or_later?
     current_phase&.publishing_prices_or_later?
   end

app/models/budget/phase.rb

@@ -47,6 +47,10 @@ class Budget
       end
     end
 
+    def valuating_or_later?
+      in_phase_or_later?("valuating")
+    end
+
     def publishing_prices_or_later?
       in_phase_or_later?("publishing_prices")
     end

spec/models/budget_spec.rb

@@ -97,6 +97,23 @@ describe Budget do
       expect(budget).to be_finished
     end
 
+    describe "#valuating_or_later?" do
+      it "returns false before valuating" do
+        budget.phase = "selecting"
+        expect(budget).not_to be_valuating_or_later
+      end
+
+      it "returns true while valuating" do
+        budget.phase = "valuating"
+        expect(budget).to be_valuating_or_later
+      end
+
+      it "returns true after valuating" do
+        budget.phase = "publishing_prices"
+        expect(budget).to be_valuating_or_later
+      end
+    end
+
     describe "#publishing_prices_or_later?" do
       it "returns false before publishing prices" do
         budget.phase = "valuating"