fix(decode): recognize VXK WMI as Opel (PSA/Stellantis-platform Corsa F, Mokka B)

Customer entered VXKUPHNKSP4032040 (2023 Corsa F) and got a bare
'Marka desteklenmiyor' — VXK was missing from all three WMI maps, so
identifyBasic could not even name the brand. PL24's opel_parts catalog
ends at CORSA-E (2015-2019, verified via the model-picker page), so the
catalog itself stays a gap, but the user now gets the honest
'Opel 2023 olarak tanındı, katalog henüz mevcut değil' message and the
miss is logged for the coverage backlog.

- WMI_BRAND_MAP + PL24_WMI_SERVICE_MAP + EMEX CATALOG_MAP: VXK -> Opel
- DECODE_CHAIN_VERSION 2 -> 3 (brand-mapping change; invalidates the
  stale negative cache for the customer's VIN)
- vin-cache-keys.spec: lock-key assertion checked the bare version char,
  which now appears inside the test VIN — assert the ✌️ segment instead

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

apps/api/src/integrations/emex/emex.types.ts

@@ -348,6 +348,7 @@ export const CATALOG_MAP: Record<string, CatalogEntry> = {
   // Opel
   W0L: { code: "GM_OP201809", brand: "Opel" },
   W0V: { code: "GM_OP201809", brand: "Opel" }, // newer Stellantis-era WMI
+  VXK: { code: "GM_OP201809", brand: "Opel" }, // PSA/Stellantis-platform Opel (Corsa F, Mokka B)
   // Chevrolet
   KL1: { code: "GM_C201809", brand: "Chevrolet" },
   // SsangYong

apps/api/src/integrations/pl24/pl24.types.ts

@@ -565,6 +565,7 @@ export const PL24_WMI_SERVICE_MAP: Record<string, string> = {
   // Opel / Vauxhall
   W0L: "opel_parts", // Opel AG (Germany)
   W0V: "opel_parts", // Opel (newer Stellantis-era WMI)
+  VXK: "opel_parts", // PSA/Stellantis-platform Opel (Corsa F, Mokka B — France/Spain plants)
 
   // Citroën (PSA)
   VF7: "citroen_parts", // Citroën SA (France)

apps/api/src/vehicles/vin-cache-keys.spec.ts

@@ -16,7 +16,8 @@ describe("vinResolveCacheKeys (Q4)", () => {
   it("keeps the in-flight lock key version-independent (cross-deploy dedupe)", () => {
     const { lockKey } = vinResolveCacheKeys(VIN);
     expect(lockKey).toBe(`vin:lock:${VIN}`);
-    expect(lockKey).not.toContain(DECODE_CHAIN_VERSION);
+    // The VIN itself may contain the version digit — check the segment, not the char.
+    expect(lockKey).not.toContain(`:${DECODE_CHAIN_VERSION}:`);
   });
 
   it("bumping the version changes the namespace (old entries become unreachable)", () => {

apps/api/src/vehicles/vin-cache-keys.ts

@@ -13,7 +13,7 @@
  * Both the decode path (VehiclesService) and the admin cache-buster
  * (InternalVehiclesService) MUST build keys through here so they stay in sync.
  */
-export const DECODE_CHAIN_VERSION = "2";
+export const DECODE_CHAIN_VERSION = "3";
 
 export function vinResolveCacheKeys(vin: string): {
   cacheKey: string;