bazel: right-size Rust test targets

codex-rs/core/BUILD.bazel

@@ -21,7 +21,6 @@ codex_rust_crate(
         "//codex-rs/windows-sandbox-rs:codex-command-runner",
         "//codex-rs/windows-sandbox-rs:codex-windows-sandbox-setup",
     ],
-    integration_test_timeout = "long",
     run_tests_with_wine_exec = True,
     rustc_env = {
         # Keep manifest-root path lookups inside the Bazel execroot for code
@@ -47,6 +46,9 @@ codex_rust_crate(
         "core-all-test": 16,
         "core-unit-tests": 8,
     },
+    test_sizes = {
+        "core-unit-tests": "medium",
+        "core-unit-tests-windows-cross": "medium",
+    },
     test_tags = ["no-sandbox"],
-    unit_test_timeout = "long",
 )