Siduri's character sheet has been updated with her level up and retraining.
I expanded her spell list significantly, which only makes sense considering that she's a five century old Wizard. Even if she hadn't spent a lot of time doing research or learning spell, just learning one per year could have given her a huge catalog of spells. This also assumes she spends a solid week some time in the coming month to learn some new 7th level spells. There's obviously a focus on Enchantment spells, but not to the exclusion of other useful magic. Her spell loadout is a balance between Enchantment spells, to take advantage of her prowess in the school of magic, and a variety of spells that can be used in situations where her Enchantment magic isn't useful for one reason or another.
This is also a huge gear upgrade, with most of it being crafted in the coming month, though there were several useful pieces which came out of the Armory (Boots of the Wide Earth, Soulfire Bracers, etc.). She's getting the standard Raiment of the Four upgrade all of our casters end up with to allow her to convert prepared spells into Magic Missile, Fireball, Freedom of Movement, and Teleport spells, which is especially helpful for her because she cannot normally cast Evocation spells. An upgrade to her robe will let her sacrifice prepared spells to use Summon Monster spells.