feat(company-explorer): bump version to 0.3.0, add VAT ID extraction, and fix deep-link scraping

- Updated version to v0.3.0 (UI & Backend) to clear potential caching confusion.
- Enhanced Impressum scraper to extract VAT ID (Umsatzsteuer-ID).
- Implemented 2-Hop scraping strategy: Looks for 'Kontakt' page if Impressum isn't on the start page.
- Added VAT ID display to the Legal Data block in Inspector.

company-explorer/frontend/src/components/Inspector.tsx

@@ -281,9 +281,10 @@ export function Inspector({ companyId, onClose, apiBase }: InspectorProps) {
                     </div>
                     
                     {(impressum.email || impressum.phone) && (
-                        <div className="mt-2 pt-2 border-t border-slate-900 flex gap-4 text-[10px] text-slate-500 font-mono">
+                        <div className="mt-2 pt-2 border-t border-slate-900 flex flex-wrap gap-4 text-[10px] text-slate-500 font-mono">
                             {impressum.email && <span>{impressum.email}</span>}
                             {impressum.phone && <span>{impressum.phone}</span>}
+                            {impressum.vat_id && <span className="text-blue-400/80">VAT: {impressum.vat_id}</span>}
                         </div>
                     )}
                 </div>