multi: move DB schemas to channeldb/models

This commit moves the ChannelEdgePolicy, ChannelEdgeInfo,
ChanelAuthProof and CachedEdgePolicy structs to the `channeldb/models`
package.

funding/manager.go

@@ -524,7 +524,7 @@ type Config struct {
 	// DeleteAliasEdge allows the Manager to delete an alias channel edge
 	// from the graph. It also returns our local to-be-deleted policy.
 	DeleteAliasEdge func(scid lnwire.ShortChannelID) (
-		*channeldb.ChannelEdgePolicy, error)
+		*models.ChannelEdgePolicy, error)
 
 	// AliasManager is an implementation of the aliasHandler interface that
 	// abstracts away the handling of many alias functions.
@@ -3335,7 +3335,7 @@ func (f *Manager) extractAnnounceParams(c *channeldb.OpenChannel) (
 func (f *Manager) addToRouterGraph(completeChan *channeldb.OpenChannel,
 	shortChanID *lnwire.ShortChannelID,
 	peerAlias *lnwire.ShortChannelID,
-	ourPolicy *channeldb.ChannelEdgePolicy) error {
+	ourPolicy *models.ChannelEdgePolicy) error {
 
 	chanID := lnwire.NewChanIDFromOutPoint(&completeChan.FundingOutpoint)
 
@@ -4067,7 +4067,7 @@ func (f *Manager) newChanAnnouncement(localPubKey,
 	remotePubKey *btcec.PublicKey, localFundingKey *keychain.KeyDescriptor,
 	remoteFundingKey *btcec.PublicKey, shortChanID lnwire.ShortChannelID,
 	chanID lnwire.ChannelID, fwdMinHTLC, fwdMaxHTLC lnwire.MilliSatoshi,
-	ourPolicy *channeldb.ChannelEdgePolicy,
+	ourPolicy *models.ChannelEdgePolicy,
 	chanType channeldb.ChannelType) (*chanAnnouncement, error) {
 
 	chainHash := *f.cfg.Wallet.Cfg.NetParams.GenesisHash

funding/manager_test.go

@@ -550,7 +550,7 @@ func createTestFundingManager(t *testing.T, privKey *btcec.PrivateKey,
 		OpenChannelPredicate:          chainedAcceptor,
 		NotifyPendingOpenChannelEvent: evt.NotifyPendingOpenChannelEvent,
 		DeleteAliasEdge: func(scid lnwire.ShortChannelID) (
-			*channeldb.ChannelEdgePolicy, error) {
+			*models.ChannelEdgePolicy, error) {
 
 			return nil, nil
 		},