Accumulated changes for message queue (#6600)

* rename

* set agent address

* refactor

* add agent sub

* pub messages

* grpc new client

* can publish records via agent

* send init message with session id

* fmt

* check cancelled request while waiting

* use sessionId

* handle possible nil stream

* subscriber process messages

* separate debug port

* use atomic int64

* less logs

* minor

* skip io.EOF

* rename

* remove unused

* use saved offsets

* do not reuse session, since always session id is new after restart

remove last active ts from SessionEntry

* simplify printing

* purge unused

* just proxy the subscription, skipping the session step

* adjust offset types

* subscribe offset type and possible value

* start after the known tsns

* avoid wrongly set startPosition

* move

* remove

* refactor

* typo

* fix

* fix changed path

weed/mq/logstore/read_log_from_disk.go

@@ -36,7 +36,7 @@ func GenLogOnDiskReadFunc(filerClient filer_pb.FilerClient, t topic.Topic, p top
 				err = fmt.Errorf("unexpected unmarshal mq_pb.Message: %v", err)
 				return
 			}
-			if logEntry.TsNs < starTsNs {
+			if logEntry.TsNs <= starTsNs {
 				pos += 4 + int(size)
 				continue
 			}