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/livekit/client.go

@@ -11,13 +11,11 @@ import (
 )
 
 type Client interface {
-	// GetJoinToken generates a JWT for a participant to join a room.
-	// Name will show up in the participant data.
+	// GetJoinToken mints a participant JWT; name surfaces as the display name.
 	GetJoinToken(roomId string, humanId string, name string) (string, error)
 	ServerUrl() string
-	// ListParticipants returns the current participants in a room.
 	ListParticipants(ctx context.Context, roomName string) ([]*livekit.ParticipantInfo, error)
-	// KeyProvider returns the key provider for verifying webhook signatures.
+	// KeyProvider is used by handlers to verify webhook signatures.
 	KeyProvider() auth.KeyProvider
 }