fix: support alias-based IPv6 interface names and add engine reset utility

- Home.vue: extend RE_IPV4/RE_IPV6 to match alias-based interface names
  like Device.IP.Interface.[BR_LAN].IPv6Address.[GUA_LAN].IPAddress
  (used by Sagemcom Livebox 4 with AliasBasedAddressing=1)
- reference_engine.ts: add resetReferenceEngine() to allow config reload
  without restart (wassup provider disabled via config/references.json)

app/services/references/reference_engine.ts

@@ -154,3 +154,7 @@ export function getReferenceEngine(): ReferenceEngine {
   }
   return instance
 }
+
+export function resetReferenceEngine(): void {
+  instance = null
+}

inertia/pages/Home.vue

@@ -57,8 +57,10 @@ function getPropertyValue(props: any[], name: string): string {
 }
 
 // Hoisted regex constants — compiled once, not on every call
-const RE_IPV4 = /^Device\.IP\.Interface\.\d+\.IPv4Address\.\d+\.IPAddress$/
-const RE_IPV6 = /^Device\.IP\.Interface\.\d+\.IPv6Address\.\d+\.IPAddress$/
+// Matches both numeric indexes (e.g. Interface.1) and alias-based names (e.g. Interface.[BR_LAN])
+const IF_SEG = /(\d+|\[[^\]]+\])/
+const RE_IPV4 = new RegExp(`^Device\\.IP\\.Interface\\.${IF_SEG.source}\\.IPv4Address\\.${IF_SEG.source}\\.IPAddress$`)
+const RE_IPV6 = new RegExp(`^Device\\.IP\\.Interface\\.${IF_SEG.source}\\.IPv6Address\\.${IF_SEG.source}\\.IPAddress$`)
 
 function getIpAddress(parameters: any[], properties: any[]): string {
   // Priority 1 : TR-098 ExternalIPAddress (reuse existing helpers to avoid duplication)