Chore: Update backlog

Author: amotl

backlog.md

@@ -10,3 +10,14 @@ From dialect split-off.
   ```
 - Re-enable doctests.
 
+## Iteration +2
+- https://docs.sqlalchemy.org/en/20/faq/performance.html
+- Is ``RETURNING`` properly supported?
+  https://docs.sqlalchemy.org/en/20/changelog/whatsnew_20.html#optimized-orm-bulk-insert-now-implemented-for-all-backends-other-than-mysql
+- Bulk *UPDATES*
+- https://docs.sqlalchemy.org/en/20/orm/queryguide/dml.html#orm-queryguide-upsert
+  via: https://github.com/sqlalchemy/sqlalchemy/discussions/6935#discussioncomment-1233465
+- Result streaming via server-side cursor
+  - https://docs.sqlalchemy.org/en/20/core/connections.html#sqlalchemy.engine.Connection.execution_options.params.stream_results
+  - https://docs.sqlalchemy.org/en/20/core/connections.html#sqlalchemy.engine.Result.yield_per
+- https://github.com/jamescasbon/vertica-sqlalchemy