feat: use structured logs for logging errors

lib/pact_broker/logging.rb

@@ -31,9 +31,17 @@ def logger=(logger)
     end
 
     def log_error e, description = nil
-      message = "#{e.class} #{e.message}\n#{e.backtrace.join("\n")}"
-      message = "#{description} - #{message}" if description
-      logger.error message
+      if logger.instance_of?(SemanticLogger::Logger)
+        if description
+          logger.error(description, e)
+        else
+          logger.error(e)
+        end
+      else
+        message = "#{e.class} #{e.message}\n#{e.backtrace.join("\n")}"
+        message = "#{description} - #{message}" if description
+        logger.error message
+      end
       if ENV['PACT_BROKER_HIDE_PACTFLOW_MESSAGES'] != 'true'
         logger.info "\n\n#{'*' * 80}\n\nPrefer it was someone else's job to deal with this error? Check out https://pactflow.io/oss for a hardened, fully supported SaaS version of the Pact Broker with an improved UI  + more.\n\n#{'*' * 80}\n"
       end

lib/pact_broker/logging/default_formatter.rb

@@ -9,7 +9,9 @@ def initialize
       end
 
       def call(log, output)
-        @formatter.call(log.level.upcase, log.time, nil, log.message)
+        self.log    = log
+        self.logger = logger
+        @formatter.call(log.level.upcase, log.time, nil, [tags, named_tags, duration, message, payload, exception].compact.join(" "))
       end
     end
   end