Blocking someone removes notifications between you

Also note in the CI guide that the build caches need disk space where
Docker keeps its data.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/api/src/services/notifications.ts

@@ -1,4 +1,4 @@
-import { and, desc, eq, gt, inArray, isNull, lt } from 'drizzle-orm';
+import { and, desc, eq, gt, inArray, isNull, lt, or } from 'drizzle-orm';
 import webpush from 'web-push';
 import {
   notificationPath,
@@ -61,6 +61,12 @@ export async function notify(input: {
   return row!.id;
 }
 
+/** After a block: neither sees notifications from the other any more. */
+export async function removeNotificationsBetween(a: string, b: string) {
+  const n = schema.notifications;
+  await db.delete(n).where(or(and(eq(n.userId, a), eq(n.actorId, b)), and(eq(n.userId, b), eq(n.actorId, a))));
+}
+
 /** Take back a reaction's notification when the reaction is removed (if it hasn't been seen). */
 export async function unnotifyReaction(userId: string, actorId: string, listenId: string) {
   const n = schema.notifications;