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/redis.go

@@ -19,7 +19,7 @@ func ConnectAndTestRedis(db int) *redis.Client {
 	redisAddr := fmt.Sprintf("%s:%s", redisHost, "6379")
 	rdb := redis.NewClient(&redis.Options{
 		Addr:     redisAddr,
-		Password: "", // no password set
+		Password: "",
 		DB:       db,
 	})