fix(openwrt): close TollGate free-access gap and mint URL mismatch

Two bugs found live against archy-x250-pa3: TollGate-3458 (the upstream
tollgate-module-basic-go installer's own default AP, rebranded from
OpenWrt's factory default wireless.default_radioN sections) was left
bound to `network=lan` — wide open, unmetered, and sharing the router's
admin LAN — because install_ipk() runs the upstream package's own
uci-defaults scripts but nothing reconciled the AP they create with the
separate `tollgate` network/bridge/firewall this project's own
provision_ssid() sets up for the "archipelago" SSID. Fixed by folding any
default_radioN section left on `lan` onto the `tollgate` network right
after it's created.

Separately, a caller-supplied mint_url with a trailing slash
(https://mint.minibits.cash/Bitcoin/) got written byte-for-byte into
accepted_mints[0].url, which tollgate-wrt string-compares exactly against
a token's embedded (slash-less) mint URL — rejecting every otherwise-valid
token as an "untrusted mint". Fixed by trimming trailing slashes before
the value is used anywhere.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KTdMfVJChCwCCYF1ZTRQLc

core/openwrt/src/tollgate/mod.rs

@@ -59,6 +59,11 @@ pub async fn provision(router: &Router, config: &TollGateConfig) -> Result<()> {
 
     config::apply(router, config)?;
     wifi::provision_ssid(router, config)?;
+    // Must come after provision_ssid (creates the `tollgate` network this
+    // folds the upstream installer's own default AP onto) — see
+    // regate_upstream_default_aps for why this is needed at all.
+    wifi::regate_upstream_default_aps(router)
+        .context("re-gate upstream tollgate-module-basic-go default AP(s)")?;
     // Must come after provision_ssid (which creates br-tollgate) and before
     // the daemon restart below — config.json is only read at startup.
     config::apply_daemon_config(router, config)