feat(prospecting): add complete prospecting module for lead discovery and scoring

Migrates scanning pipeline from marketing-.lu-domains app into Orion module.
Supports digital (domain scan) and offline (manual capture) lead channels
with enrichment, scoring, campaign management, and interaction tracking.

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

app/modules/prospecting/tests/unit/test_lead_service.py

@@ -0,0 +1,59 @@
+# app/modules/prospecting/tests/unit/test_lead_service.py
+"""
+Unit tests for LeadService.
+"""
+
+import pytest
+
+from app.modules.prospecting.services.lead_service import LeadService
+
+
+@pytest.mark.unit
+@pytest.mark.prospecting
+class TestLeadService:
+    """Tests for LeadService."""
+
+    def setup_method(self):
+        self.service = LeadService()
+
+    def test_get_leads_empty(self, db):
+        """Test getting leads when none exist."""
+        leads, total = self.service.get_leads(db)
+        assert total == 0
+        assert leads == []
+
+    def test_get_leads_with_scored_prospect(self, db, prospect_with_score):
+        """Test getting leads returns scored prospects."""
+        leads, total = self.service.get_leads(db)
+        assert total >= 1
+
+    def test_get_leads_filter_min_score(self, db, prospect_with_score):
+        """Test filtering leads by minimum score."""
+        leads, total = self.service.get_leads(db, min_score=70)
+        assert total >= 1  # prospect_with_score has score 72
+
+        leads, total = self.service.get_leads(db, min_score=90)
+        assert total == 0  # No prospect has score >= 90
+
+    def test_get_leads_filter_lead_tier(self, db, prospect_with_score):
+        """Test filtering leads by tier."""
+        leads, total = self.service.get_leads(db, lead_tier="top_priority")
+        assert total >= 1  # prospect_with_score is top_priority (72)
+
+    def test_get_top_priority(self, db, prospect_with_score):
+        """Test getting top priority leads."""
+        leads = self.service.get_top_priority(db)
+        assert len(leads) >= 1
+
+    def test_get_quick_wins(self, db, prospect_with_score):
+        """Test getting quick win leads (score 50-69)."""
+        # prospect_with_score has score 72, not a quick win
+        leads = self.service.get_quick_wins(db)
+        # May be empty if no prospects in 50-69 range
+        assert isinstance(leads, list)
+
+    def test_export_csv(self, db, prospect_with_score):
+        """Test CSV export returns valid CSV content."""
+        csv_content = self.service.export_csv(db)
+        assert isinstance(csv_content, str)
+        assert "domain" in csv_content.lower() or "score" in csv_content.lower()