feat: web search for contacts, copyright year, contact page scan, CMS/age from Gemini

- replicate_ai: DDG pre-search runs before every Gemini call; top 4 snippets
  injected into prompt so Gemini can find phone/email not on homepage
- replicate_ai: explicit instructions to use search results for contact lookup
- replicate_ai: new output fields cms_detected + site_last_updated
- site_analyzer: copyright year extracted from footer (© / copyright pattern)
- site_analyzer: Last-Modified from HTTP header + OG meta tag
- site_analyzer: scans /contacto /contact /contactanos /sobre-nosotros for
  additional emails/phones (parallel with sitemap/robots fetch)
- index.html: modal shows CMS (AI-detected), Last Updated (red if pre-2021)

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

app/static/index.html

@@ -187,6 +187,8 @@ tr:hover td{background:rgba(255,255,255,.025)}
 
     <div class="mrow"><span class="mlabel">Reasoning</span><span x-text="modal.ai.lead_reasoning||'—'"></span></div>
     <div class="mrow"><span class="mlabel">KD notes</span><span x-text="modal.ai.kit_digital_reasoning||'—'"></span></div>
+    <div class="mrow"><span class="mlabel">CMS</span><span x-text="modal.ai.cms_detected || modal.sa?.cms || '—'"></span></div>
+    <div class="mrow"><span class="mlabel">Last updated</span><span :style="(modal.ai.site_last_updated&&parseInt(modal.ai.site_last_updated)<2021)?'color:var(--danger)':''" x-text="modal.ai.site_last_updated || (modal.sa?.copyright_year ? 'Copyright '+modal.sa.copyright_year : '—')"></span></div>
     <div class="mrow"><span class="mlabel">Performance</span><span x-text="modal.ai.performance_notes||'—'"></span></div>
     <div class="mrow"><span class="mlabel">SEO</span><span x-text="modal.ai.seo_status||'—'"></span></div>
     <div class="mrow"><span class="mlabel">Hosting</span><span x-text="(modal.sa?.org||'?') + ' / ' + (modal.sa?.ip_country||'?') + (modal.sa?.eu_hosted===false?' ❌ Non-EU':modal.sa?.eu_hosted?' ✅ EU':'')"></span></div>