Plugin should run more extensive checks

Currently, the plugin says your system is ready as soon as the host has SQLite and SQLite3 class exists.

But MATH functions (like FLOOR) are not available before SQLite 3.35 [1]. While that version is more than 2 years old, Linux distros like Debian stable [2] (which is the one where the WordPress 7.x Docker images are based from [3]) still have 3.34.

IMHO, the plugin should make sure all the TOKENs it supports and creates SQLIte queries for (like FLOOR [4]) are supported in the server, so maybe a version check should be done against the SQLite3 version running on the server.

[1] https://www.sqlite.org/changes.html#version_3_35_0
[2] https://packages.debian.org/bullseye/libsqlite3-0
[3] https://hub.docker.com/layers/library/wordpress/php7.4-fpm/images/sha256-08a1cb1fbe022cd08d5d19e6f95ab549194927959a297da41590d4f2d884f7b4?context=explore
[4] https://github.com/WordPress/sqlite-database-integration/blob/main/wp-includes/sqlite/class-wp-sqlite-lexer.php#L919

Read the plugin's readiness check and the SQLite token definitions in wp-includes/sqlite/class-wp-sqlite-lexer.php around line 919. Trace how supported SQL functions are checked before the plugin reports the system ready. Done means incompatible SQLite capabilities, including FLOOR, are detected rather than accepted.