graph: indent visual root in graph #28457

Job	Run time
config	8s
fuzz smoke test	1m 12s
static-analysis	5m 45s
win build	5m 19s
rust-analysis	1m 28s
win+Meson build	5m 33s
sparse	3m 36s
documentation	7m 18s
osx-meson (macos-14)	28m 21s
osx-reftable (macos-14)	16m 38s
osx-clang (macos-14)	20m 52s
osx-gcc (macos-14)	21m 12s
linux-reftable-leaks (ubuntu:rolling)	31m 25s
linux-breaking-changes (ubuntu:rolling)	12m 47s
linux-asan-ubsan (ubuntu:rolling)	35m 20s
linux-leaks (ubuntu:rolling)	29m 56s
linux32 (i386/ubuntu:focal)	10m 21s
linux-musl-meson (alpine:latest)	8m 2s
debian-11 (debian:11)	54s
linux-meson (ubuntu:rolling)	13m 56s
linux-sha256 (ubuntu:rolling)	13m 36s
almalinux-8 (almalinux:8)	13m 25s
fedora-breaking-changes-meson (fedora:latest)	9m 57s
linux-reftable (ubuntu:rolling)	14m 1s
linux-TEST-vars (ubuntu:20.04)	12m 56s
win+VS build	0s
win+VS test	0s
win test (6)	12m 30s
win test (9)	7m 23s
win test (4)	6m 7s
win test (1)	6m 54s
win test (5)	6m 42s
win test (0)	5m 42s
win test (2)	7m 16s
win test (3)	13m 8s
win test (8)	6m 2s
win test (7)	6m 14s
win+Meson test (2)	7m 54s
win+Meson test (5)	12m 16s
win+Meson test (4)	10m 12s
win+Meson test (3)	9m 17s
win+Meson test (6)	12m 28s
win+Meson test (9)	7m 13s
win+Meson test (0)	6m 48s
win+Meson test (8)	9m 59s
win+Meson test (7)	6m 23s
win+Meson test (1)	7m 54s
	8h 12m 20s

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