Added activities module

backend/migrations/000007_create_activity_logs.up.sql

@@ -0,0 +1,30 @@
+CREATE UNLOGGED TABLE activity_logs
+(
+    id          BIGSERIAL PRIMARY KEY,
+    family_id   BIGINT REFERENCES families (id) ON DELETE CASCADE,
+    user_id     BIGINT       NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    action      TEXT         NOT NULL,
+    entity_type TEXT         NOT NULL,
+    entity_id   BIGINT,
+    description TEXT         NOT NULL,
+    created_at  TIMESTAMP    NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX idx_activity_logs_created_at ON activity_logs (created_at DESC);
+CREATE INDEX idx_activity_logs_user_id ON activity_logs (user_id);
+CREATE INDEX idx_activity_logs_family_id ON activity_logs (family_id);
+
+DO
+$$
+BEGIN
+    IF EXISTS (SELECT 1 FROM cron.job WHERE jobname = 'cleanup_activity_logs_hourly') THEN
+        PERFORM cron.unschedule((SELECT jobid FROM cron.job WHERE jobname = 'cleanup_activity_logs_hourly'));
+    END IF;
+END
+$$;
+
+SELECT cron.schedule(
+    'cleanup_activity_logs_hourly',
+    '0 * * * *',
+    $$DELETE FROM activity_logs WHERE created_at < NOW() - INTERVAL '1 day'$$
+);