backfill: implement

Signed-off-by: Sumner Evans <sumner.evans@automattic.com>

go.mod

@@ -1,17 +1,17 @@
 module go.mau.fi/mautrix-telegram
 
-go 1.21
+go 1.22
 
 require (
 	github.com/gotd/td v0.105.0
 	github.com/rs/zerolog v1.33.0
 	github.com/stretchr/testify v1.9.0
-	go.mau.fi/util v0.6.1-0.20240802175451-b430ebbffc98
+	go.mau.fi/util v0.7.0
 	go.mau.fi/zerozap v0.1.1
 	go.uber.org/zap v1.27.0
-	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56
-	golang.org/x/net v0.27.0
-	maunium.net/go/mautrix v0.19.1-0.20240807155838-eabab275895d
+	golang.org/x/exp v0.0.0-20240808152545-0cdaa3abc0fa
+	golang.org/x/net v0.28.0
+	maunium.net/go/mautrix v0.20.1-0.20240820143721-591ac60f0caa
 )
 
 require (
@@ -30,6 +30,7 @@ require (
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-sqlite3 v1.14.22 // indirect
+	github.com/petermattis/goid v0.0.0-20240813172612-4fcff4a6cae7 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rs/xid v1.5.0 // indirect
 	github.com/segmentio/asm v1.2.0 // indirect
@@ -44,10 +45,10 @@ require (
 	go.opentelemetry.io/otel/trace v1.28.0 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/crypto v0.25.0 // indirect
-	golang.org/x/sync v0.7.0 // indirect
-	golang.org/x/sys v0.22.0 // indirect
-	golang.org/x/text v0.16.0 // indirect
+	golang.org/x/crypto v0.26.0 // indirect
+	golang.org/x/sync v0.8.0 // indirect
+	golang.org/x/sys v0.24.0 // indirect
+	golang.org/x/text v0.17.0 // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	maunium.net/go/mauflag v1.0.0 // indirect