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/utils/random_generator.go

@@ -10,7 +10,6 @@ const (
 	charsetNumbers = "0123456789"
 )
 
-// RandomString generates a random string of length n based on self defined charset
 func RandomString(length int) string {
 	sb := strings.Builder{}
 	sb.Grow(length)
@@ -20,7 +19,6 @@ func RandomString(length int) string {
 	return sb.String()
 }
 
-// RandomStringNumbers
 func RandomStringNumbers(length int) string {
 	sb := strings.Builder{}
 	sb.Grow(length)