I've made the updates to the database, by rsyncing most of the dev version over the live codebase (keeping a backup).

The changes are:

1. There's now a "First Line" field in the Poems table, where you can add the first line of a poem which otherwise would be indistinguishable from others with similar titles ("Song", "Sonnet" etc.).
2. The "Related poems" field now uses a combination of the Title, the First line (if there is one), and the id of a poem to give you something which (I hope) is findable and unique for each poem. When poems start with punctuation (quotes or whatever) they'll sort to the beginning, so you usually need to scroll past the quoted titles to get to the regular ones.
3. There is now a publicly-accessible read-only view of the database here. I haven't linked this from anywhere or publicized it yet; I think the plan is to hide the notes field in this view, which will take a bit of work.

One note: there's an additional field in the poems table which just amalgamates all the text values of the other major fields, to make for a simple search field, which was used for the WordPress plugin. Since that's no longer working, and it was going to be difficult to combine the trigger I needed for the new First line field with the original trigger that also ran on update on that table, I've removed the original trigger. That means the plugin will no longer work, so if we need it to do so at some point, we'll need to figure out how to combine those two triggers in a single operation.