feat: add apphash to core header info (#16739)

Co-authored-by: Aaron Craelius <aaron@regen.network>

core/CHANGELOG.md

@@ -36,6 +36,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+## [v0.9.0](https://github.com/cosmos/cosmos-sdk/releases/tag/core%2Fv0.9.0)
+
+* [#16739](https://github.com/cosmos/cosmos-sdk/pull/16739) Add `AppHash` to header.Info.
+
 ## [v0.8.0](https://github.com/cosmos/cosmos-sdk/releases/tag/core%2Fv0.8.0)
 
 * [#15519](https://github.com/cosmos/cosmos-sdk/pull/15519) Update `comet.VoteInfo` for CometBFT v0.38.

core/header/service.go

@@ -16,4 +16,5 @@ type Info struct {
 	Hash    []byte    // Hash returns the hash of the block header
 	Time    time.Time // Time returns the time of the block
 	ChainID string    // ChainId returns the chain ID of the block
+	AppHash []byte    // AppHash used in the current block header
 }