feat(workflow): add exponential backoff support

[conan8737]

This PR implements exponential backoff support for workflows. The core logic follows the same pattern as the existing saga transaction handler, as referenced in issue #572.

[yedf2]

@conan8737 there is test failure. Can you fix it?

[conan8737]

@yedf2 please try again

I can't reproduce this issue because I don't have a local MySQL environment, so I tested it on Redis instead. I suspect it's a problem with this piece of code, so I deleted it.

if err == nil && (time.Since(t.lastTouched)+NowForwardDuration >= 1500*time.Millisecond ||
		t.NextCronInterval > conf.RetryInterval && t.NextCronInterval > t.RetryInterval) {
		t.touchCronTime(cronReset, 0)
}

Because for Workflow, this is the end of the entire transaction (maybe one of the sub-transactions encountered an error), while in Saga, each sub-transaction is processed individually, so I thik this logic is unnecessary for Workflow.

[conan8737]

@yedf2 please try again
I have figured out what's going on. When a transaction rollback, query_prepared returns a Failure error, and exponential backoff should not be applied in this case. So I added a condition to check for this error.
else if err != nil && !errors.Is(err, dtmimp.ErrFailure)

redis

dtm/dtmsvr/storage/redis/redis.go

Line 360 in 18146ee

if old ~= ARGV[5] then

sql

dtm/dtmsvr/storage/sql/sql.go

Line 161 in 18146ee

dbGet().Must().Model(global).Where("status=? and gid=?", global.Status, global.Gid).

boltdb

dtm/dtmsvr/storage/boltdb/boltdb.go

Line 419 in 18146ee

if g == nil || g.Gid != global.Gid {