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/config.py

@@ -0,0 +1,34 @@
+# app/modules/prospecting/config.py
+"""
+Module configuration.
+
+Environment-based configuration using Pydantic Settings.
+Settings are loaded from environment variables with PROSPECTING_ prefix.
+
+Example:
+    PROSPECTING_PAGESPEED_API_KEY=your_key
+"""
+from pydantic_settings import BaseSettings
+
+
+class ModuleConfig(BaseSettings):
+    """Configuration for prospecting module."""
+
+    # PageSpeed Insights API key (optional, free 25k/day without key)
+    pagespeed_api_key: str = ""
+
+    # HTTP request timeout in seconds
+    http_timeout: int = 10
+
+    # Batch operation limits
+    batch_size: int = 100
+
+    # Max concurrent HTTP requests for batch scanning
+    max_concurrent_requests: int = 10
+
+    model_config = {"env_prefix": "PROSPECTING_"}
+
+
+# Export for auto-discovery
+config_class = ModuleConfig
+config = ModuleConfig()