Convex 1.50 ships multi-account CLI switching

Account switching was one of Convex's most persistent developer papercuts, forcing engineers managing multiple client or personal projects to manually swap credentials or rely on community shell wrappers. Native alias support removes that friction while hardening CLI security defaults.

• –Aliases like `work` and `personal` can be bound directly to specific project directories or toggled on the fly via `convex account select`.
• –The `CONVEX_ACCOUNT` environment variable enables straightforward account selection across automated CI/CD runners and scripts.
• –File permissions for credentials in `~/.convex/` are now restricted to the file owner on Linux and macOS.
• –Headless exports allow teams to trigger database backups via the CLI without forcing an immediate local download.