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/models/prospect_contact.py

@@ -0,0 +1,44 @@
+# app/modules/prospecting/models/prospect_contact.py
+"""
+Contact information for a prospect.
+
+Supports both auto-scraped (digital) and manually entered (offline) contacts.
+"""
+
+import enum
+
+from sqlalchemy import Boolean, Column, Enum, ForeignKey, Integer, String, Text
+from sqlalchemy.orm import relationship
+
+from app.core.database import Base
+from models.database.base import TimestampMixin
+
+
+class ContactType(str, enum.Enum):
+    EMAIL = "email"
+    PHONE = "phone"
+    ADDRESS = "address"
+    SOCIAL = "social"
+    FORM = "form"
+
+
+class ProspectContact(Base, TimestampMixin):
+    """Contact information associated with a prospect."""
+
+    __tablename__ = "prospect_contacts"
+
+    id = Column(Integer, primary_key=True, index=True)
+    prospect_id = Column(Integer, ForeignKey("prospects.id", ondelete="CASCADE"), nullable=False, index=True)
+
+    contact_type = Column(Enum(ContactType), nullable=False)
+    value = Column(String(500), nullable=False)
+    label = Column(String(100), nullable=True)  # e.g., "info", "sales", "main"
+    source_url = Column(Text, nullable=True)  # Page where contact was found
+    source_element = Column(String(100), nullable=True)  # e.g., "mailto", "tel", "contact-form"
+
+    is_validated = Column(Boolean, nullable=False, default=False)
+    validation_error = Column(Text, nullable=True)
+    is_primary = Column(Boolean, nullable=False, default=False)
+
+    # Relationships
+    prospect = relationship("Prospect", back_populates="contacts")