fix(pl24): pass Ford VIN BOM detail URL through fetchP4Page baseUrl prefix

fetchFordVinBomParts was forwarding the relative HTML jsonUrl with
isFullUrl=true, which made undici try to parse \`/ford/fordp_parts/…\`
as an absolute URL and throw "Failed to parse URL" for every PNC row.
The Hyundai BOM expander next door calls fetchP4Page with the default
isFullUrl=false (relative path) — match that.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/api/src/integrations/pl24/pl24-ford-legacy.service.ts

@@ -2411,7 +2411,10 @@ export class PL24FordLegacyService {
     const parts: PL24Part[] = [];
     for (const row of rows) {
       try {
-        const jsonStr = await this.fetchP4Page(row.jsonUrl, serviceName, true);
+        // row.jsonUrl is the relative path captured from the BOM HTML
+        // (e.g. /ford/fordp_parts/json-vin-bom-detail.action?...) — let
+        // fetchP4Page prefix the baseUrl, same as the Hyundai BOM expander.
+        const jsonStr = await this.fetchP4Page(row.jsonUrl, serviceName);
         if (!jsonStr) continue;
         const data = JSON.parse(jsonStr) as {
           details?: {