Improve error resilience and handling

Timeouts are now handled correctly and the Runner automatically
creates the execution environment if it could not be found in
Poseidon. The runner is deleted locally if Poseidon returns
a bad request error.

app/models/runner.rb

@@ -39,8 +39,8 @@ class Runner < ApplicationRecord
     define_method(method) do |*args, &block|
       @strategy.send(method, *args, &block)
     rescue Runner::Error::NotFound
-      update(runner_id: self.class.strategy_class.request_from_management(execution_environment))
-      @strategy = self.class.strategy_class.new(runner_id, execution_environment)
+      request_new_id
+      save
       @strategy.send(method, *args, &block)
     end
   end
@@ -48,10 +48,22 @@ class Runner < ApplicationRecord
   private
 
   def request_id
-    return if runner_id.present?
+    request_new_id if runner_id.blank?
+  end
 
+  def request_new_id
     strategy_class = self.class.strategy_class
     self.runner_id = strategy_class.request_from_management(execution_environment)
     @strategy = strategy_class.new(runner_id, execution_environment)
+  rescue Runner::Error::NotFound
+    if strategy_class.sync_environment(execution_environment)
+      raise Runner::Error::NotFound.new(
+        "The execution environment with id #{execution_environment.id} was not found and was successfully synced with the runner management"
+      )
+    else
+      raise Runner::Error::NotFound.new(
+        "The execution environment with id #{execution_environment.id} was not found and could not be synced with the runner management"
+      )
+    end
   end
 end