fix(vehicles): canonicalise brand casing (case-insensitive brand match)

Decode persist looked brands up with a case-sensitive eq(), so an
uppercase decode string ("FORD") missed canonical "Ford" → brand_id
NULL + raw uppercase stored as brand_name, splitting one brand across
casing variants in analytics/catalog. Now matches brands
case-insensitively and stores the canonical name. Migration
0013_fix_brand_casing backfills existing rows (60 on prod, 1 on dev).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/api/src/vehicles/vehicles.service.ts

@@ -193,16 +193,22 @@ export class VehiclesService {
 
     // 3. Brand access check
     let brandId: string | null = null;
-    const brandName = resolved.brandName;
+    // Match the brands table case-insensitively and adopt the CANONICAL name:
+    // decode sources emit the brand with inconsistent casing ("FORD" vs "Ford"),
+    // and a case-sensitive lookup left brand_id NULL + stored the raw uppercase
+    // string, splitting one brand across casing variants. See migration
+    // 0013_fix_brand_casing for the backfill of pre-existing rows.
+    let brandName = resolved.brandName;
     if (brandName) {
       const [brand] = await this.db
         .select()
         .from(brands)
-        .where(eq(brands.name, brandName))
+        .where(sql`lower(${brands.name}) = lower(${brandName})`)
         .limit(1);
 
       if (brand) {
         brandId = brand.id;
+        brandName = brand.name;
         await this.checkBrandAccess(userId, brandId);
       }
     }