Declare logging domain for database-related messages

Here is an example:

    ?LOG_DEBUG(
      "DB: initialization successeful",
      #{domain => ?RMQLOG_DOMAIN_DB}),

Author: dumbbell

deps/rabbit_common/include/logging.hrl

@@ -4,6 +4,7 @@
 
 -define(RMQLOG_DOMAIN_CHAN,       ?DEFINE_RMQLOG_DOMAIN(channel)).
 -define(RMQLOG_DOMAIN_CONN,       ?DEFINE_RMQLOG_DOMAIN(connection)).
+-define(RMQLOG_DOMAIN_DB,         ?DEFINE_RMQLOG_DOMAIN(db)).
 -define(RMQLOG_DOMAIN_FEAT_FLAGS, ?DEFINE_RMQLOG_DOMAIN(feature_flags)).
 -define(RMQLOG_DOMAIN_MIRRORING,  ?DEFINE_RMQLOG_DOMAIN(mirroring)).
 -define(RMQLOG_DOMAIN_PRELAUNCH,  ?DEFINE_RMQLOG_DOMAIN(prelaunch)).