fix: Fix v0.45->v0.46 migration (#12028)

## Description

closes #12027 

- Add `tendermint key-migrate` subcommand
- Fix in-place store migrations

Test:
- on v0.45 node, make a proposal to update software, make it pass
- wait for node to halt
- on v0.46 binary, run `simd tendermint key-migrate`
- on v0.46 binary, run `simd start --mode validator`
- make sure the v0.46 node runs correctly



---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/main/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

server/tm_cmds.go

@@ -3,10 +3,14 @@ package server
 // DONTCOVER
 
 import (
+	"context"
 	"fmt"
 
 	"github.com/spf13/cobra"
+	cfg "github.com/tendermint/tendermint/config"
 	pvm "github.com/tendermint/tendermint/privval"
+	"github.com/tendermint/tendermint/scripts/keymigrate"
+	"github.com/tendermint/tendermint/scripts/scmigrate"
 	tversion "github.com/tendermint/tendermint/version"
 	"sigs.k8s.io/yaml"
 
@@ -123,3 +127,67 @@ func VersionCmd() *cobra.Command {
 		},
 	}
 }
+
+// makeKeyMigrateCmd is ported from tendermint's key-migrate command, but
+// uses the SDK's own server.Context.
+// ref: https://github.com/tendermint/tendermint/blob/master/UPGRADING.md#database-key-format-changes
+func makeKeyMigrateCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "key-migrate",
+		Short: "Run Tendermint database key migration",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			ctx, cancel := context.WithCancel(cmd.Context())
+			defer cancel()
+
+			serverCtx := GetServerContextFromCmd(cmd)
+			config := serverCtx.Config
+
+			contexts := []string{
+				// this is ordered to put the
+				// (presumably) biggest/most important
+				// subsets first.
+				"blockstore",
+				"state",
+				"peerstore",
+				"tx_index",
+				"evidence",
+				"light",
+			}
+
+			for idx, dbctx := range contexts {
+				serverCtx.Logger.Info("beginning a key migration",
+					"dbctx", dbctx,
+					"num", idx+1,
+					"total", len(contexts),
+				)
+
+				db, err := cfg.DefaultDBProvider(&cfg.DBContext{
+					ID:     dbctx,
+					Config: config,
+				})
+
+				if err != nil {
+					return fmt.Errorf("constructing database handle: %w", err)
+				}
+
+				if err = keymigrate.Migrate(ctx, db); err != nil {
+					return fmt.Errorf("running migration for context %q: %w",
+						dbctx, err)
+				}
+
+				if dbctx == "blockstore" {
+					if err := scmigrate.Migrate(ctx, db); err != nil {
+						return fmt.Errorf("running seen commit migration: %w", err)
+
+					}
+				}
+			}
+
+			serverCtx.Logger.Info("completed database migration successfully")
+
+			return nil
+		},
+	}
+
+	return cmd
+}

server/util.go

@@ -283,6 +283,7 @@ func AddCommands(rootCmd *cobra.Command, defaultNodeHome string, appCreator type
 		tmcmd.ResetAllCmd,
 		tmcmd.ResetStateCmd,
 		tmcmd.InspectCmd,
+		makeKeyMigrateCmd(),
 	)
 
 	startCmd := StartCmd(appCreator, defaultNodeHome)