A bunch of work on the morphologies resource: morphology foma scripts are now both generated and compiled in worker threads and all foma scripts now generate a new ``compile_attempt`` UUID value when the compile attempt has concluded (instead of a ``datetimeCompiled`` value as previously); also, morphology foma scripts can now be toggled as lexc (quicker to compile, but opaque) or regex (slower to compile, but transparent); created a new db migration script to accommodate the new morphology/phonology attributes.