feat(cron): set default enabled state for cron jobs

- Added logic to default the `enabled` property to `true` if not explicitly set as a boolean in the cron job input.
- Updated job creation and store functions to ensure consistent handling of the `enabled` state across the application.
- Enhanced input normalization to improve job configuration reliability.

This update ensures that cron jobs are enabled by default, enhancing user experience and reducing potential misconfigurations.

src/cron/service/store.ts

@@ -101,6 +101,11 @@ export async function ensureLoaded(state: CronServiceState) {
       mutated = true;
     }
 
+    if (typeof raw.enabled !== "boolean") {
+      raw.enabled = true;
+      mutated = true;
+    }
+
     const payload = raw.payload;
     if (payload && typeof payload === "object" && !Array.isArray(payload)) {
       if (migrateLegacyCronPayload(payload as Record<string, unknown>)) {