docs: improve SEO metadata across docs pages

docs/api-reference/entities/delete-user.mdx

@@ -1,5 +1,5 @@
 ---
 title: 'Delete User'
-description: "Remove a user entity from the Mem0 platform by entity type and ID using the DELETE endpoint."
+description: "Send a DELETE request to /v2/entities/{entity_type}/{entity_id}/ to permanently remove a user entity from your Mem0 project by ID."
 openapi: delete /v2/entities/{entity_type}/{entity_id}/
 ---

docs/api-reference/entities/get-users.mdx

@@ -1,5 +1,5 @@
 ---
 title: 'Get Users'
-description: "Retrieve a list of all user entities stored in the Mem0 platform using the GET endpoint."
+description: "Send a GET /v1/entities request to list every user entity in your Mem0 project, returning IDs, names, created_at, and metadata fields."
 openapi: get /v1/entities/
 ---