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/exceptions.py

@@ -0,0 +1,80 @@
+# app/modules/prospecting/exceptions.py
+"""
+Prospecting module exceptions.
+"""
+
+from app.exceptions.base import (
+    BusinessLogicException,
+    ExternalServiceException,
+    ResourceNotFoundException,
+)
+
+
+class ProspectNotFoundException(ResourceNotFoundException):  # noqa: MOD025
+    """Raised when a prospect is not found."""
+
+    def __init__(self, identifier: str):
+        super().__init__(
+            resource_type="Prospect",
+            identifier=identifier,
+        )
+
+
+class ScanJobNotFoundException(ResourceNotFoundException):  # noqa: MOD025
+    """Raised when a scan job is not found."""
+
+    def __init__(self, identifier: str):
+        super().__init__(
+            resource_type="ScanJob",
+            identifier=identifier,
+        )
+
+
+class CampaignTemplateNotFoundException(ResourceNotFoundException):  # noqa: MOD025
+    """Raised when a campaign template is not found."""
+
+    def __init__(self, identifier: str):
+        super().__init__(
+            resource_type="CampaignTemplate",
+            identifier=identifier,
+        )
+
+
+class DuplicateDomainException(BusinessLogicException):  # noqa: MOD025
+    """Raised when trying to create a prospect with a domain that already exists."""
+
+    def __init__(self, domain_name: str):
+        super().__init__(
+            message=f"A prospect with domain '{domain_name}' already exists",
+            error_code="DUPLICATE_DOMAIN",
+        )
+
+
+class ScanFailedException(ExternalServiceException):  # noqa: MOD025
+    """Raised when an enrichment scan fails."""
+
+    def __init__(self, scan_type: str, domain: str, reason: str):
+        super().__init__(
+            message=f"{scan_type} scan failed for {domain}: {reason}",
+            service_name=f"prospecting_{scan_type}",
+        )
+
+
+class CampaignRenderException(BusinessLogicException):  # noqa: MOD025
+    """Raised when campaign template rendering fails."""
+
+    def __init__(self, template_id: int, reason: str):
+        super().__init__(
+            message=f"Failed to render campaign template {template_id}: {reason}",
+            error_code="CAMPAIGN_RENDER_FAILED",
+        )
+
+
+__all__ = [
+    "ProspectNotFoundException",
+    "ScanJobNotFoundException",
+    "CampaignTemplateNotFoundException",
+    "DuplicateDomainException",
+    "ScanFailedException",
+    "CampaignRenderException",
+]