Rename hi3518ev300_lite_bathhouse to yuancam-dgk423403 (#153)

The device is a YuanCam-branded (HQLS/hdwificam OEM) HI3518EV300 board —
confirmed on a lab unit via its Factory.bin/SysParam.bin tags
("YuanCamFactory"/"YuanCamSysparam") and its P2P device id
(DGK-423403-YZHGE). Rename the placeholder "Bathhouse" profile to a
proper vendor-model name and fill in the sensor, identified on hardware
with ipctool as JXH62 (previously "?" in the README table). The
defconfig, customizer.sh and excludes list carry over unchanged except
for the upgrade URL, which now points at the renamed release asset.

README.md

@@ -19,7 +19,6 @@ Aoni EP01J05             T31L         ?         RTL8188FU_USB    NOR_16M   new
 Azarton C1               T20X         JXF23     RTL8189FS_SDIO   NOR_16M   done
 Azarton C1               T31X         GC2053    RTL8189FS_SDIO   NOR_16M   done
 Babysense See HD IP206   SSC333       GC2053    RTL8188FU_USB    NOR_16M   done
-Bathhouse                HI3518EV300  ?         RTL8188FU_USB    NOR_8M    research
 Botslab C213             T23N         SC3332    ATBM6012B_USB    NOR_8M    **INIT** - frozen
 CCDCAM IM50Q01           SSC377QE     IMX335    -                NOR_16M   done
 ChinaTelecom DS-YTJ5301  SSC30KD      GC2053    RTL8188FU_USB    NOR_16M   video-ok, wifi-no, motors-no
@@ -101,6 +100,7 @@ Xiaomi MJSXJ02HL         HI3518EV300  JXF22     RTL8189FS_SDIO   NOR_16M   prepa
 Xiaomi MJSXJ03HL         T31N         JXQ03     RTL8189FS_SDIO   NOR_16M   done
 Xiaomi MJSXJ03HL         T31N         JXQ03P    RTL8189FS_SDIO   NOR_16M   done
 Xiaomi MJSXJ05HL         T31L         GC2053    ATBM6031_SDIO    NOR_16M   preparation
+YuanCam DGK-423403       HI3518EV300  JXH62     RTL8188FU_USB    NOR_8M    research
 ZTE K540                 T31X         SC4336    ATBM6012B_USB    NOR_16M   done
 4G Camera XG521 V1.2     GK7202V300   GC1054    EC800E-CN_USB    NOR_8M    done
 XM IPG-G3-WR             GK7202V300   JXH63     ATBM60321S_USB   NOR_8M    done

devices/hi3518ev300_lite_yuancam-dgk423403/general/overlay/usr/share/openipc/customizer.sh

@@ -5,7 +5,7 @@
 #
 # Set custom upgrade url
 #
-fw_setenv upgrade 'https://github.com/OpenIPC/builder/releases/download/latest/hi3518ev300_lite_bathhouse-nor.tgz'
+fw_setenv upgrade 'https://github.com/OpenIPC/builder/releases/download/latest/hi3518ev300_lite_yuancam-dgk423403-nor.tgz'
 fw_setenv wlandev rtl8188fu-generic
 #
 #