Upon inspecting the pre-shared key, I found that it had a prior incorrect password of "123456" and now had the correct password "password". So I closed 1Password on my computer and reset the password to my usual password on my phone... the same password that I'd used to reset 1Password and that was passed in via the master password tool to reset the 1Password.app package.
The persistent storage file (pws and spws in the PNG file) is always 400 KB in size, so 8 KB is a very small overhead for a device that has a reasonably sized (well, usually) storage, even if it doesn't have a very large amount of RAM.
The encrypted file format's patch file format type is a mixture of OpenBSD ssh/sshgen patches, Linux/Android patches and even Apple original patches, resulting in a significantly different scheme than that used by our Linux binaries. The patches are copied into place by the patch file writer during the main Swift code load, and so they are not copied to the resulting binary when encrypted.
Only hardened mode is generating the master key while using a master password. So in the application directory I created the file /Applications/1Password.app/Contents/Resources/key.cif and put this: d2c66b5586