How To Read Apple Mail Without AppleScript (It's 1000x Faster)

I have an agent that scans my inbox every morning and flags anything urgent. The first version used AppleScript. It took 45 seconds to walk 500 messages across five accounts. By the time it finished, the coffee was cold and I had lost interest in whatever it was about to tell me. The second version reads Apple Mail's SQLite envelope index directly. It takes 32 milliseconds. That's not a typo. It's roughly a 1,400x speedup, and it completely changed what I can build on top of Mail.app. Here's h...