Permanent WSL2 dev fix for multi-subnet source-address trap

Mirrored mode re-clones the Windows NIC's addresses each boot, so the kernel
keeps picking the wrong source for stacked device subnets (10.0.10.x sourced
from 192.168.1.123) — ARP resolves but ping/TCP dies, and every runtime
ip-route fix is wiped by wsl --shutdown.

deploy/wsl-fix-route-source.sh pins each scope-link route's src to this
host's own address in that subnet (no hardcoded IPs, idempotent, preserves
metric, non-fatal per route, waits for the route at boot). deploy/parking-net
.service reapplies it on every boot.

Dev-box only; the appliance is bare-metal Linux with static networkd config.
Verified: camera pings with no -I flag; driver pulls a snapshot with no
localAddress set.

deploy/parking-net.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Parking dev: pin route source addresses (WSL2 mirrored-mode fix)
+# Run after WSL has populated the mirrored interfaces/addresses.
+After=network.target wsl-pro.service
+Wants=network.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+# Idempotent; safe to re-run. Path is the repo checkout on this dev box.
+ExecStart=/home/julian/projects/JS/parking-system/deploy/wsl-fix-route-source.sh eth1
+# Mirrored-mode addresses can land slightly after boot; one retry covers the race.
+ExecStartPost=/bin/sh -c 'sleep 3; /home/julian/projects/JS/parking-system/deploy/wsl-fix-route-source.sh eth1 || true'
+
+[Install]
+WantedBy=multi-user.target