logging: suppress unstructured log lines

config/environments/production.rb

@@ -50,17 +50,15 @@ Rails.application.configure do
                                        .tap  { |logger| logger.formatter = ::Logger::Formatter.new }
                                        .then { |logger| ActiveSupport::TaggedLogging.new(logger) }
 
+  # Suppress unstructured log lines
+  config.log_level = :fatal
+
   # Structured JSON logging
   config.structured_logging.logger = ActiveSupport::Logger.new(STDOUT)
 
   # Prepend all log lines with the following tags.
   config.log_tags = [ :request_id ]
 
-  # "info" includes generic and useful information about system operation, but avoids logging too much
-  # information to avoid inadvertent exposure of personally identifiable information (PII). If you
-  # want to log everything, set the level to "debug".
-  config.log_level = ENV.fetch("RAILS_LOG_LEVEL", "info")
-
   # Use a different cache store in production.
   config.cache_store = :solid_cache_store