feat: add heap snapshot

public/openapi/read/admin/advanced/heap/dump.yaml

@@ -0,0 +1,18 @@
+get:
+  tags:
+    - admin
+  summary: Get nodejs heap snapshot
+  description: Downloads a Node.js heap snapshot for memory analysis.
+  parameters: []
+  responses:
+    "200":
+      description: Heap snapshot file (in .heapsnapshot format)
+      content:
+        application/octet-stream:
+          schema:
+            type: string
+            format: binary
+          examples:
+            heapSnapshot:
+              summary: Example Heap Snapshot Download
+              description: A binary heap snapshot file.