refactor: Use cleanup manager to unsubscribe web3 subscriptions

[bgins]

Summary

This pull request makes the following changes:

• Unsubscribe from web3 events using cleanup manager
• Add unsubscribeSub helper

This pull request refactors our web3 subscriptions to unsubscribe using our cleanup manager.

Test plan

Add a temporary print line to the new unsubscribeSub helper function to confirm that it is called when exiting the process.

Details

This change unsubscribes as a part of our clean up when we receive a cancellation signal.

[walkah]

Seems to work. Not sure if this is related, but I get the following output when existing a service (this is from solver):

C2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
Unsubscribing
Unsubscribing
Unsubscribing
2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
Unsubscribing
Unsubscribing
2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
Unsubscribing

Seems like we're trying to restart listeners maybe one last time?

[bgins]

Seems to work. Not sure if this is related, but I get the following output when existing a service (this is from solver):

C2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
Unsubscribing
Unsubscribing
Unsubscribing
2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
Unsubscribing
Unsubscribing
2024-11-18T15:22:22-05:00 ERR ../../../.asdf/installs/golang/1.22.6/go/src/runtime/asm_arm64.s:1222 > error starting listeners: cancel by context reconnect in 2 seconds
Unsubscribing

Seems like we're trying to restart listeners maybe one last time?

It's related. We aren't properly handling cancellation when starting these subscriptions:

lilypad/pkg/web3/events.go

Lines 52 to 64 in 52de132

	for _, collection := range eventChannels.collections {
	c := collection
	go func() {
	for {
	err := c.Start(sdk, ctx, cm)
	if err != nil {
	log.Error().Msgf("error starting listeners: %s reconnect in 2 seconds", err.Error())
	}
	time.Sleep(time.Second * 2)
	}
	}()
	}

We call Start over each of the subscriptions, passing in the cleanup manager, which this PR uses to call unsubscribe. This loop will continue to attempt to connect though, so we likely want to check for cancellation. We may also want exponential backoff and max retries here as well.