test: satisfy mypy in catalog_contents and ts_types tests

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: Rusty Conover

tests/catalog/test_catalog_contents.py

@@ -520,14 +520,14 @@ def test_item_encoding_sorts_map_keys() -> None:
     from vgi.protocol import _item_ipc_bytes
 
     a = SchemaInfo(
-        attach_opaque_data=b"x",
+        attach_opaque_data=AttachOpaqueData(b"x"),
         path=["s"],
         comment=None,
         tags={"b": "2", "a": "1"},
         estimated_object_count={"view": 0, "table": 3},
     )
     b = SchemaInfo(
-        attach_opaque_data=b"x",
+        attach_opaque_data=AttachOpaqueData(b"x"),
         path=["s"],
         comment=None,
         tags={"a": "1", "b": "2"},

tests/test_generated_ts_types.py

@@ -18,6 +18,7 @@
 import pytest
 
 from vgi.codegen import ts_types
+from vgi.codegen._common import GeneratorError
 from vgi.codegen.ts_types import TS_RECORD_TYPES, build_model, emit
 
 
@@ -90,7 +91,7 @@ def test_unsupported_type_raises() -> None:
     """An Arrow type with no mapping fails loudly instead of emitting a wrong type."""
     import pyarrow as pa
 
-    with pytest.raises(ts_types.GeneratorError):
+    with pytest.raises(GeneratorError):
         ts_types._ts_type(pa.struct([pa.field("a", pa.int32())]), "X.a")