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/cmd/memberreconciler/main.go

@@ -1,13 +1,7 @@
-// memberreconciler is a one-shot job (also safe to run on a cron) that makes
-// the Firestore membership mirror (humans/{humanId}.networks) match the
-// authoritative Postgres network_members table.
-//
-// Run on a cron to heal any drift from a dropped mirror
-// write in network.Service.
-//
-// The reconciler reads the current Firestore state and only writes humans
-// whose mirrored networks differ from Postgres. Writes cost ~3x reads, and in
-// steady state drift is rare, so read-first keeps the cron nearly free.
+// memberreconciler reconciles the Firestore membership mirror
+// (humans/{humanId}.networks) against the authoritative Postgres
+// network_members table. Safe to run on a cron — only humans whose mirrored
+// set differs from Postgres are written, so a steady-state run is nearly free.
 package main
 
 import (
@@ -98,8 +92,7 @@ func reconcile(
 	return written, scanned, nil
 }
 
-// snapshotMirror streams the humans collection once and returns a map of
-// humanId -> current networks array. One iterator, N billed reads.
+// One iterator, N billed reads — returns humanId → mirrored networks.
 func snapshotMirror(ctx context.Context, fs *firestore.Client) (map[string][]string, error) {
 	out := map[string][]string{}
 	iter := fs.Collection("humans").Documents(ctx)
@@ -124,9 +117,8 @@ func snapshotMirror(ctx context.Context, fs *firestore.Client) (map[string][]str
 	return out, nil
 }
 
-// sameSet reports whether a and b contain the same elements, ignoring order
-// and duplicates. Firestore array ops don't preserve order, so set equality is
-// the right comparison for the networks array.
+// Set equality (order- and duplicate-insensitive); Firestore array ops don't
+// preserve order.
 func sameSet(a, b []string) bool {
 	if len(a) == 0 && len(b) == 0 {
 		return true