feat: Gemini AI assessment, Kit Digital detection, contact extraction

Kit Digital detection (enricher.py):
- Scans img src/alt/srcset for digitalizadores, kit-digital, fondos-europeos etc
- Scans page text for Kit Digital, Agente Digitalizador, Next Generation EU, PRTR
- Scans links for acelerapyme.es, red.es, kit-digital refs
- +20 score bonus for Kit Digital confirmed sites (proven IT buyers)

Contact extraction (enricher.py):
- Pulls mailto/tel/wa.me links from HTML
- Extracts email addresses via regex, phone numbers (ES format)
- Detects social media links (FB, IG, LinkedIn, Twitter, TikTok)
- Stored as JSON in contact_info column

Gemini via Replicate (replicate_ai.py):
- Assesses lead quality (HOT/WARM/COLD), Kit Digital confirmation
- Identifies best contact channel + actual value (email/phone/WA)
- Writes Spanish cold-call/email pitch angle
- Lists services likely needed + outreach notes
- 3 concurrent requests, 90s timeout, JSON output parsing

DB: migration adds kit_digital, kit_digital_signals, contact_info,
    ai_assessment, ai_lead_quality, ai_pitch, ai_contact_channel/value,
    ai_queue table

UI: Kit Digital 🏅 badge, AI quality pill (clickable modal with full
    assessment), contact chips (email/phone/WA/social), AI Assess button,
    Kit Digital only filter, AI queue status in enrichment tab

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

app/scorer.py

@@ -41,6 +41,9 @@ def score(domain_row: dict) -> int:
         s += 10
     if local_biz_keywords(domain_row.get("page_title")):
         s += 5
+    # Kit Digital: proven buyer of IT services
+    if domain_row.get("kit_digital"):
+        s += 20
     return min(s, 100)