I would add two potential foreshadowings and one obvious one:

“Dresden,” Murphy snapped, “wake up.”
I blinked. “Not asleep,” I slurred. “Just resting my eyes.”
She snorted. “Save it, Harry,” she said, and pushed a cup into my hands. She’d made me coffee with a ton of sugar in it, just the way I like, and even though it was a little stale, it smelled like heaven.
“You’re an angel,” I muttered.”

Storm Front, Ch.11

This foreshadows Harry seeing Murphy with the sight, and also what I think her ultimate destiny is (assuming she dies).

“Then get used to it,” I said. “I’m never going to be your knight.”
Mab tilted back her head and let out that nerve-searing laughter again. “I have time,” she said. “And you mortals find life to be very sweet. Two favors you yet owe me, and make no mistake, I will collect. One day you will kneel at my feet.”

Dead Beat, Chapter 21.

“I bit out a little laugh. “Yeah. You’re a saint.”
“One day,” Nicodemus said. “One day. But for now, let’s say a face-to-face meeting. A talk. Just you and I.”

Small Favor, Chapter 36

Has the book been completed?