Mobile notifications for iOS (#210)

* mobile: wire notification registration and listener

* implement backend components for push notifications

* refactor: agentic comment cleanup

* docs: use proper module name for particle processor

* set required env variables for push notifications

* bump version

* fix: always upsert push token on mobile start

* Revert "fix: always upsert push token on mobile start"

This reverts commit 90ff18a788.

* send push notifications regardless of online status

go/internal/particle/networkmembershipchecker.go

@@ -5,6 +5,5 @@ import "context"
 //go:generate go tool mockgen -source ./networkmembershipchecker.go -destination ./mocks/networkmembershipchecker.go
 
 type NetworkMembershipChecker interface {
-	// IsMember returns true if the humanId is a member of the network.
 	IsMember(ctx context.Context, networkID, humanId string) (bool, error)
 }