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/schemas/campaign.py

@@ -0,0 +1,103 @@
+# app/modules/prospecting/schemas/campaign.py
+"""Pydantic schemas for campaign management."""
+
+from datetime import datetime
+
+from pydantic import BaseModel, Field
+
+
+class CampaignTemplateCreate(BaseModel):
+    """Schema for creating a campaign template."""
+
+    name: str = Field(..., max_length=255)
+    lead_type: str = Field(
+        ...,
+        pattern="^(no_website|bad_website|gmail_only|security_issues|performance_issues|outdated_cms|general)$",
+    )
+    channel: str = Field("email", pattern="^(email|letter|phone_script)$")
+    language: str = Field("fr", max_length=5)
+    subject_template: str | None = Field(None, max_length=500)
+    body_template: str = Field(...)
+    is_active: bool = True
+
+
+class CampaignTemplateUpdate(BaseModel):
+    """Schema for updating a campaign template."""
+
+    name: str | None = Field(None, max_length=255)
+    lead_type: str | None = None
+    channel: str | None = None
+    language: str | None = Field(None, max_length=5)
+    subject_template: str | None = None
+    body_template: str | None = None
+    is_active: bool | None = None
+
+
+class CampaignTemplateResponse(BaseModel):
+    """Schema for campaign template response."""
+
+    id: int
+    name: str
+    lead_type: str
+    channel: str
+    language: str
+    subject_template: str | None = None
+    body_template: str
+    is_active: bool
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class CampaignSendCreate(BaseModel):
+    """Schema for sending a campaign."""
+
+    template_id: int
+    prospect_ids: list[int] = Field(..., min_length=1)
+
+
+class CampaignPreviewRequest(BaseModel):
+    """Schema for previewing a rendered campaign."""
+
+    template_id: int
+    prospect_id: int
+
+
+class CampaignPreviewResponse(BaseModel):
+    """Schema for campaign preview response."""
+
+    subject: str | None = None
+    body: str
+
+
+class CampaignSendResponse(BaseModel):
+    """Schema for campaign send record response."""
+
+    id: int
+    template_id: int | None = None
+    prospect_id: int
+    channel: str
+    rendered_subject: str | None = None
+    rendered_body: str | None = None
+    status: str
+    sent_at: datetime | None = None
+    sent_by_user_id: int | None = None
+    created_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class CampaignSendListResponse(BaseModel):
+    """List of campaign sends."""
+
+    items: list[CampaignSendResponse]
+    total: int
+
+
+class CampaignTemplateDeleteResponse(BaseModel):
+    """Response for template deletion."""
+
+    message: str