refactor: Switching to a cron system for tasks, restructuring service and status models

Added response time field for Status model, set log level from ENV

migrations/00004_add_metric_columns_to_statuses.sql

@@ -0,0 +1,8 @@
+-- +goose Up
+alter table statuses
+    add column response_time integer default null;
+
+-- +goose Down
+
+alter table statuses
+    drop column response_time;