Keep nested Go schemas formatted and pin protocol v3 integration

Author: rustyconover

.github/workflows/integration.yml

@@ -27,7 +27,8 @@ concurrency:
 env:
   # The test suite and native Actions artifact must come from this exact ref.
   # The downloader verifies its provenance against the checked-out commit.
-  VGI_REF: fc3e08f7e7fd800165a0edc00313de46fed15329
+  VGI_REF: a83ff7e8cd46aa840a10e78fe9b31603931824c2
+  VGI_NATIVE_RUNNER_BRANCH: release/vgi-v3-ci-20261028
   # CI is not a user: its ATTACHes should not land in Query.Farm's adoption data.
   # The vgi extension fires a telemetry event per successful ATTACH, and this
   # suite performs several hundred of them per lane, so opting out keeps the

vgi/codegen/go_schemas.py

@@ -136,7 +136,7 @@ def _emit_type(dtype: pa.DataType, *, origin: str) -> str:
         child_exprs = [
             _emit_field_literal(dtype.field(i), origin=f"{origin}[struct child {i}]") for i in range(dtype.num_fields)
         ]
-        return "arrow.StructOf(\n" + ",\n".join("\t\t" + c for c in child_exprs) + ",\n\t)"
+        return "arrow.StructOf(\n" + ",\n".join("\t\t" + c.replace("\n", "\n\t") for c in child_exprs) + ",\n\t)"
 
     if pa.types.is_timestamp(dtype):
         unit_map = {