test(capabilities): expect export_run in the agent tool manifest

The run-reader set gained export_run (CSV export of a stored run), but this
manifest assertion still expected only read_run/search_run. Add export_run so
the agent-door test reflects the shipped readers.

surfsense_backend/tests/unit/capabilities/access/test_agent_tools.py

@@ -78,8 +78,14 @@ async def test_registry_becomes_one_tool_per_verb_plus_readers(isolate):
     tools = isolate.module.build_capability_tools(workspace_id=7, capabilities=caps)
 
     by_name = {t.name: t for t in tools}
-    # One tool per verb, plus the two shared run-reader tools.
-    assert set(by_name) == {"web_scrape", "web_discover", "read_run", "search_run"}
+    # One tool per verb, plus the shared run-reader tools.
+    assert set(by_name) == {
+        "web_scrape",
+        "web_discover",
+        "read_run",
+        "search_run",
+        "export_run",
+    }
     assert by_name["web_scrape"].description == "web.scrape does a thing."
     assert by_name["web_scrape"].args_schema is _EchoInput