docs: add describe_database verification step to getting-started guide

learn/getting-started/create-your-first-application.mdx

@@ -157,6 +157,36 @@ Click "Restart Cluster" to apply the new file changes.
 
 </Tabs>
 
+## Verifying the Table Was Created
+
+Once Harper has started, confirm your `Dog` table was picked up from `schema.graphql` by running:
+
+```bash
+harper describe_database database=data
+```
+
+You should see YAML output describing the `Dog` table and its attributes:
+
+```yaml
+Dog:
+  schema: data
+  name: Dog
+  primary_key: id
+  attributes:
+    - attribute: id
+      type: ID
+      is_primary_key: true
+    - attribute: name
+      type: String
+    - attribute: breed
+      type: String
+    - attribute: age
+      type: Int
+  ...
+```
+
+If the table is missing, double-check that `config.yaml` references the correct schema file and that Harper restarted after the file was saved.
+
 ## Enabling the REST API
 
 Navigate back to the `schema.graphql` file and add `@export` directive to the table schema: