fix(docs): add missing SEO frontmatter to autogen integration page

autogen.md (PR #719) was added after the SEO check (PR #787) without
required title and description frontmatter, causing verify-generated-files
CI to fail on all branches.

Author: kagura-agent

hindsight-docs/docs/sdks/integrations/autogen.md

@@ -1,5 +1,7 @@
 ---
 sidebar_position: 12
+title: "AutoGen Persistent Memory with Hindsight | Integration"
+description: "Add long-term memory to AutoGen agents with Hindsight. Provides FunctionTool instances for retain, recall, and reflect that plug directly into AutoGen's AssistantAgent."
 ---
 
 # AutoGen