chore: cli subscription command registration + env and deploy docs

- inkreach-cli: subscription command in bin, built dist
- env.development: public origin, plugin service registry, cache
  provider=redis, cold retention days
- skill docs: subscription quick reference, deploy and ops notes

dist/lib/client.js

@@ -271,5 +271,26 @@ class Client {
     removeDeveloper(userId) {
         return this.call('DELETE', `/api/plugin-developers/${encodeURIComponent(userId)}`);
     }
+    // ---- subscription center (record subscriptions) ----
+    listSubscriptions(baseId, tableId) {
+        const q = tableId ? `?tableId=${encodeURIComponent(tableId)}` : '';
+        return this.call('GET', `/api/base/${baseId}/subscription${q}`);
+    }
+    getSubscriptionEvents(baseId, subscriptionId) {
+        return this.call('GET', `/api/base/${baseId}/subscription/${subscriptionId}/event`);
+    }
+    createSubscription(baseId, body) {
+        return this.call('POST', `/api/base/${baseId}/subscription`, body);
+    }
+    updateSubscription(baseId, subscriptionId, body) {
+        return this.call('PATCH', `/api/base/${baseId}/subscription/${subscriptionId}`, body);
+    }
+    deleteSubscription(baseId, subscriptionId) {
+        return this.call('DELETE', `/api/base/${baseId}/subscription/${subscriptionId}`);
+    }
+    /** 立即发送（flush pending digest events） */
+    sendSubscriptionNow(baseId, subscriptionId) {
+        return this.call('POST', `/api/base/${baseId}/subscription/${subscriptionId}/send`);
+    }
 }
 exports.Client = Client;