ChatGPT now lets you lock sensitive chats behind a PIN

- PIN: 4 events in the last 90 days
- Previous: 31 days earlier · trunk/dbb1581e3ba839073b21616683b3a3106818c800: [aot_compile] Pin when the no-match report resolves forward (#197301)
What happened
OpenAI has introduced a new "locked chats" feature to protect users' more sensitive conversations with ChatGPT.
Summary assembled by rule from the sources below