feat: QuickGroups shortcut — VIN SSD + vid=0 for fast category fetch

When EMEX DB has no vehicle match (Ford EU, Mercedes etc.), instead of
falling back to full on-demand VIN decode (~8s), use the VIN-decode SSD
directly with QuickGroups.aspx?c={catalog}&vid=0&ssd={vinSsd} (~2-3s).

Tested: Ford Focus CB4 VIN SSD returns 376 categories via QuickGroups.

New step 3.5 in the cascade:
1. pathData → matchByName (DB-only, ~50ms)
2. emexVehicleName → matchByName (DB-only, ~50ms)
3. matchBySsd wizard walk (DB, ~2-3s)
3.5. VIN SSD → QuickGroups shortcut (~2-3s) ← NEW
4. Fallback → full on-demand scrape (~8s)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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

@@ -697,6 +697,28 @@ export class EmexService {
     }
   }
 
+  /**
+   * Fetch categories from QuickGroups.aspx using catalog code + SSD.
+   * Used as a shortcut when wizard identifies the model but DB has no match.
+   * Returns flat category list with gid/name/url, or empty array on failure.
+   */
+  async fetchQuickGroupsBySsd(
+    catalogCode: string,
+    ssd: string,
+  ): Promise<Array<{ gid: string | null; name: string; url: string }>> {
+    const url = `${EMEX_BASE_URL}/QuickGroups.aspx?c=${catalogCode}&vid=0&ssd=${encodeURIComponent(ssd)}`;
+    this.logger.log(`EMEX QuickGroups shortcut: ${url.slice(0, 100)}...`);
+    try {
+      const html = await this.fetchEmexHtml(url);
+      const cats = this.parseCategoryList(html);
+      this.logger.log(`EMEX QuickGroups shortcut: ${cats.length} categories`);
+      return cats;
+    } catch (err) {
+      this.logger.warn(`EMEX QuickGroups shortcut failed: ${(err as Error).message}`);
+      return [];
+    }
+  }
+
   /**
    * Gets the catalog code for a VIN
    */