feat: complete transfer and eviction execution

tests/test_transfer.py

@@ -9,6 +9,7 @@ from uuid import uuid4
 from archive_clients.state import ClientStore
 from archive_clients.transfer import (
     FileMaterializer,
+    TransferIntegrityError,
     canonical_message_json,
     load_published_transfer,
     materialize_transfer,
@@ -212,6 +213,22 @@ class TransferHappyPathTests(unittest.TestCase):
         self.assertEqual(first, second)
         self.assertEqual(first, canonical_message_json(manifest))
 
+    def test_manifest_rejects_case_colliding_target_paths(self):
+        manifest = self._manifest()
+        manifest.files[1].target_canonical_path = "album/ONE.bin"
+        with self.assertRaisesRegex(
+            TransferIntegrityError, "case-colliding target"
+        ):
+            stage_transfer(
+                manifest,
+                source_root=self.source,
+                sync_root=self.sync,
+                store=self.store,
+                artifact_sources={
+                    "metainfo/source.torrent": self.metainfo
+                },
+            )
+
     def _manifest(self, job_id=None):
         manifest = transfer_pb2.TransferManifest(
             manifest_version=1,