changed genre scanning to parse multiple genres, updated db to accommodate.

backend/database/sql/queries/genres.sql

@@ -0,0 +1,24 @@
+-- name: UpsertGenre :one
+INSERT INTO genres (name) VALUES (?)
+ON CONFLICT(name) DO UPDATE SET name = name
+RETURNING *;
+
+-- name: CreateRecordingGenre :exec
+INSERT OR IGNORE INTO recording_genres (recording_id, genre_id)
+VALUES (?, ?);
+
+-- name: DeleteRecordingGenres :exec
+DELETE FROM recording_genres
+WHERE recording_id = ?;
+
+-- name: GetGenresByRecordingID :many
+SELECT g.*
+FROM genres g
+JOIN recording_genres rg ON g.id = rg.genre_id
+WHERE rg.recording_id = ?;
+
+-- name: DeleteAllRecordingGenres :exec
+DELETE FROM recording_genres;
+
+-- name: DeleteAllGenres :exec
+DELETE FROM genres;