[jeremydmiller]

Follow-up to #5252 (johnkaram02), which made actions chained after ScheduleRetryIndefinitely() apply to its listed delays. As that PR's description pointed out, the attempts after the listed delays still came from FailureRule.InfiniteSource, which is a bare continuation source with nowhere to put additional actions.

Given

opts.OnException<X>()
    .ScheduleRetryIndefinitely(1.Minutes(), 5.Minutes())
    .AndPauseProcessing(10.Minutes());

Attempt	Before	After
1	retry in 1 min + pause	same
2	retry in 5 min + pause	same
3 and later	retry every 5 min, no pause	retry every 5 min + pause

The same gap made RequeueIndefinitely().AndPauseProcessing(...) never pause at all. It also dropped additional actions from CustomActionIndefinitely(), and from ContinueWith() after its first attempt.

Change

• FailureRule keeps its infinite source in a FailureSlot of its own (InfiniteSlot) and builds the open-ended attempts from it, so they combine with additional actions exactly as a numbered slot does.
• InfiniteSource still returns the source that was set, with no actions attached. The Kafka and Pulsar transports read it to recognise their native policies, and Pulsar sets it directly.
• FailureActions applies AndPauseProcessing / AndPauseSending / And(...) to that slot while it belongs to the current segment of the chain. Then clears it, as it already clears the numbered slots, so ScheduleRetry(1m).AndPauseProcessing(5m).Then.RequeueIndefinitely() does not pause on the requeues.
• FailureRule.ToString() describes the open-ended attempts with their additional actions.

Tests

FailureRuleCollectionTests gets five tests:

• ScheduleRetryIndefinitely keeps pausing after its listed delays
• RequeueIndefinitely().AndPauseProcessing(...)
• CustomActionIndefinitely(...).And<...>()
• additional actions stay with their own segment of the chain
• the rule's description

The first three fail on main and pass with this change.

Local verification (net9.0, Release):

• dotnet build wolverine.slnx -c Release -f net9.0: clean
• CoreTests, full suite: 3932 passed, 8 skipped, 0 failed

🤖 Generated with Claude Code

https://claude.ai/code/session_01DCggXgxnG3EBXoR9rrq37U