Send last metadata when connecting to icecast. #11968

Job	Run time
build_opam (4.14.x)	9m 41s
build_js	2m 22s
build_details	4s
build_opam (5.2.x)	5m 9s
tree_sitter_parse	51s
build_no_depopts	5m 58s
build_win32 (x64)	4m 41s
lezer_parse	47s
run_tests (@citest)	12m 48s
run_tests (@doctest)	7m 44s
build_posix (debian_trixie, amd64)	14m 22s
update_doc	0s
run_tests (@mediatest)	12m 8s
build_posix (debian_trixie, arm64)	13m 30s
build_posix (debian_bookworm, amd64)	13m 53s
build_posix (debian_bookworm, arm64)	12m 24s
build_posix (ubuntu_oracular, amd64)	13m 44s
build_posix (ubuntu_oracular, arm64)	13m 41s
build_posix (ubuntu_noble, amd64)	13m 42s
build_posix (ubuntu_noble, arm64)	13m 19s
build_posix (alpine, amd64)	9m 53s
build_posix (alpine, arm64)	8m 17s
fetch_s3_artifacts	21s
build_docker_alpine (amd64)	48s
build_docker_alpine (arm64)	47s
update_release	0s
build_docker (amd64)	2m 33s
build_docker_minimal (amd64)	2m 12s
build_docker (arm64)	2m 1s
build_docker_minimal (arm64)	1m 52s
build_docker_alpine_minimal (amd64)	46s
build_docker_alpine_minimal (arm64)	1m 23s
build_docker_release-minimal	0s
build_docker_release	0s
	3h 21m 41s

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