v1.39.1

Release notes This is a patch release on top of 1.39.0 with a round of bug fixes and reliability improvements across snap sync, networking, JSON-RPC, and the experimental Flat DB. Overview Full diff: 1.39.0...1.39.1 8 changes since 1.39.0. Highlights: Flat DB (experimental, opt-in) — fixed a disposal race between shutdown and in-flight trie-warmer jobs ( #12237 ) eth_simulateV1 now bounds the…