Attended Sysupgrade fails from 24.10.0-rc5 to 24.10.0-rc7 on WZR-HP-AG300H

{
"url": "https://sysupgrade.openwrt.org",
"branch": "24.10",
"revision": "r28304-6dacba30a7",
"efi": null,
"advanced_mode": "1",
"request_hash": "",
"sha256_unsigned": "",
"client": "luci/undefined",
"packages": {
"kmod-usb-storage": "6.6.69-r1",
"libopenssl": "3.0.15-r1",
"libpam": "1.5.2-r1",
"libc": "1.2.5-r4",
"avahi-dbus-daemon": "0.8-r9",
"opkg": "2024.10.1638eccbb1-r1",
"wpad-basic-mbedtls": "2024.09.155ace39b0-r2",
"luci-i18n-base-ja": "25.021.3071836b6107",
"libpthread": "1.2.5-r4",
"libubus-lua": "2025.01.02afa57cce-r1",
"nano": "8.3-r1",
"kmod-tun": "6.6.69-r1",
"luci-i18n-attendedsysupgrade-ja": "25.021.3071836b6107",
"libtasn1": "4.19.0-r2",
"swconfig": "12",
"kmod-crypto-md5": "6.6.69-r1",
"kmod-lib-crc-ccitt": "6.6.69-r1",
"getrandom": "2024.04.2685f10530-r1",
"kmod-asn1-decoder": "6.6.69-r1",
"kmod-pppoe": "6.6.69-r1",
"libuuid": "2.40.2-r1",
"libcap": "2.69-r1",
"libavahi-client": "0.8-r9",
"procd-ujail": "2024.12.2242d39376-r1",
"base-files": "16496dacba30a7",
"libustream-mbedtls": "2024.07.2899bd3d2b-r1",
"ddns-scripts": "2.8.2-r52",
"firewall4": "2024.12.1818fc0ead-r1",
"uboot-envtools": "2024.07-r1",
"kmod-usb-ohci": "6.6.69-r1",
"dnsmasq": "2.90-r3",
"attr": "2.5.2-r3",
"kmod-crypto-sha256": "6.6.69-r1",
"kmod-crypto-acompress": "6.6.69-r1",
"ddns-scripts-noip": "2.8.2-r52",
"luci-app-ddns": "25.024.211134d6c9a4",
"kmod-usb2": "6.6.69-r1",
"libmbedtls": "3.6.2-r1",
"libgnutls": "3.8.5-r1",
"odhcp6c": "2024.09.25b6ae9ffa-r1",
"kmod-ath9k": "6.6.69.6.12.6-r1",
"uci": "2025.01.2016ff0bad-r1",
"lua": "5.1.5-r11",
"kmod-fs-ext4": "6.6.69-r1",
"luci-ssl": "25.021.3071836b6107",
"dropbear": "2024.86-r1",
"luci-i18n-package-manager-ja": "25.021.3071836b6107",
"kmod-nls-utf8": "6.6.69-r1",
"libgmp": "6.3.0-r1",
"mtd": "26",
"odhcpd-ipv6only": "2024.05.08a2988231-r1",
"kmod-owl-loader": "6.6.69.6.12.6-r1",
"samba4-server": "4.18.8-r1",
"urandom-seed": "3",
"ppp": "2.5.1-r1",
"kmod-gpio-button-hotplug": "6.6.69-r5",
"logd": "2024.04.2685f10530-r1",
"libreadline": "8.2-r2",
"luci-i18n-ddns-ja": "25.024.211134d6c9a4",
"kmod-dnsresolver": "6.6.69-r1",
"kmod-crypto-ecb": "6.6.69-r1",
"kmod-crypto-des": "6.6.69-r1",
"attendedsysupgrade-common": "9",
"kmod-ppp": "6.6.69-r1",
"luci-i18n-firewall-ja": "25.021.3071836b6107",
"luci-app-samba4": "25.024.211134d6c9a4",
"luci-proto-relay": "25.021.3071836b6107",
"liblua": "5.1.5-r11",
"ca-bundle": "20240203-r1",
"libuclient": "2024.10.2288ae8f20-r1",
"liblucihttp-lua": "2023.03.159b5b683f-r1",
"luci": "25.021.3071836b6107",
"owut": "2025.01.06e623a900-r1",
"kmod-usb-ledtrig-usbport": "6.6.69-r1",
"luci-i18n-openvpn-ja": "25.024.211134d6c9a4",
"kmod-lib-lzo": "6.6.69-r1",
"kmod-ath": "6.6.69.6.12.6-r1",
"kernel": "6.6.698a59efb5b60b2afd0fd0c33f40800cbf-r1",
"kmod-fs-cifs": "6.6.69-r1",
"libatomic": "13.3.0-r4",
"libtirpc": "1.3.4-r1",
"libpopt": "1.19-r1",
"openvpn-mbedtls": "2.6.12-r1",
"kmod-scsi-core": "6.6.69-r1",
"urngd": "2023.11.0144365eb1-r1",
"ppp-mod-pppoe": "2.5.1-r1",
"luci-app-openvpn": "25.024.21113~4d6c9a4"
},
"profile": "buffalo,wzr-hp-ag300h",
"target": "ath79/generic",
"version": "24.10.0-rc5",
"diff_packages": true,
"filesystem": "squashfs"
}

Start by reproducing the request against https://sysupgrade.openwrt.org for branch 24.10, profile buffalo,wzr-hp-ag300h, and version 24.10.0-rc5. Investigate the attended sysupgrade failure and identify the missing error details or server-side path involved; done means the upgrade request succeeds or the failure is reported with a verified cause and regression coverage.