docs: fix temporal reasoning doc accuracy

- Revert OSS search tip to user_id kwarg form (not filters dict)
- Remove false "additional top-level fields" claim in migration guide; restore "response shape is unchanged" wording
- Remove score_breakdown from JSON examples (not a real response field)
- Remove cookbook-style "See it in action" section from temporal-reasoning.mdx

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/core-concepts/memory-operations/search.mdx

@@ -215,7 +215,7 @@ client.search("preferences", filters={
 - **Use natural language**: Mem0 understands intent, so describe what you're looking for naturally
 - **Scope with user ID**: Always provide `user_id` to scope search to relevant memories
   - **Platform API**: Use `filters={"user_id": "alice"}`
-  - **OSS**: Use `filters={"user_id": "alice"}`
+  - **OSS**: Use `user_id="alice"` as parameter
 - **Combine filters**: Use AND/OR logic to create precise queries (Platform)
 - **Consider wildcard filters**: Use wildcard filters (e.g., `run_id: "*"`) for broader matches
 - **Tune parameters**: Adjust `top_k` for result count, `threshold` for relevance cutoff