Add memory management APIs for OpenViking: list, read, write, and delete memories

tests/test_memory_system_server.py

@@ -14,6 +14,8 @@ def test_memory_system_server_exposes_routes():
     assert {"GET", "POST"} <= context_methods
     assert "/memory-system/search" in paths
     assert "/memory-system/resources" in paths
+    assert "/memory-system/memories" in paths
+    assert "/memory-system/memories/content" in paths
     assert "/memory-system/users/{user_id}/profile" in paths
     task_methods = {
         method
@@ -36,6 +38,20 @@ def test_memory_system_server_exposes_routes():
         for method in getattr(route, "methods", set())
     }
     assert {"DELETE", "POST"} <= resource_methods
+    memory_methods = {
+        method
+        for route in app.routes
+        if getattr(route, "path", "") == "/memory-system/memories"
+        for method in getattr(route, "methods", set())
+    }
+    memory_content_methods = {
+        method
+        for route in app.routes
+        if getattr(route, "path", "") == "/memory-system/memories/content"
+        for method in getattr(route, "methods", set())
+    }
+    assert {"DELETE", "GET", "POST"} <= memory_methods
+    assert {"GET"} <= memory_content_methods
 
 
 def test_memory_system_messages_does_not_require_account_key_header():