[AZ-240] [AZ-241] [AZ-242] Add native retrieval remediation

Implement the product remediation paths required before greenfield
code testability revision: native VIO backend selection, local
VPR descriptor index retrieval, and computed anchor matching gates.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/satellite_service/__init__.py

@@ -1,6 +1,12 @@
 """Offline satellite retrieval and synchronization component."""
 
-from .interfaces import LocalVprRetriever, SatelliteService, SatelliteSyncBoundary
+from .interfaces import (
+    CpuFaissDescriptorIndex,
+    DescriptorIndex,
+    LocalVprRetriever,
+    SatelliteService,
+    SatelliteSyncBoundary,
+)
 from .types import (
     DescriptorFidelityReport,
     GeneratedTileUploadRecord,
@@ -18,7 +24,9 @@ from .types import (
 )
 
 __all__ = [
+    "CpuFaissDescriptorIndex",
     "DescriptorFidelityReport",
+    "DescriptorIndex",
     "GeneratedTileUploadRecord",
     "LocalVprIndexPackage",
     "LocalVprRetriever",