Add services layer, tests, streaming UI, and cleanup legacy code

crawler/services/__init__.py

@@ -0,0 +1,41 @@
+"""Services package for real estate crawler.
+
+This package contains two layers of services:
+
+## Low-level services (internal implementation):
+- listing_fetcher: Fetches listing data from Rightmove API
+- image_fetcher: Downloads floorplan images
+- floorplan_detector: OCR-based square meter detection from floorplans
+- route_calculator: Calculates transit routes using Google Maps API
+
+## High-level services (use these in CLI and API):
+- listing_service: Unified listing operations (get, refresh, download images, etc.)
+- export_service: Export listings to CSV, GeoJSON
+- district_service: District lookup and validation
+- task_service: Background task management
+"""
+# Low-level services (internal)
+from services.listing_fetcher import dump_listings, dump_listings_full
+from services.image_fetcher import dump_images
+from services.floorplan_detector import detect_floorplan
+from services.route_calculator import calculate_route
+
+# High-level services (CLI and API should use these)
+from services import listing_service
+from services import export_service
+from services import district_service
+from services import task_service
+
+__all__ = [
+    # Low-level
+    "dump_listings",
+    "dump_listings_full",
+    "dump_images",
+    "detect_floorplan",
+    "calculate_route",
+    # High-level
+    "listing_service",
+    "export_service",
+    "district_service",
+    "task_service",
+]