Require vgi-rpc 0.43.0 for correct nullability under Annotated

vgi-rpc's schema derivation reported "not optional" for every field wrapped in
`Annotated`, because `get_origin(Annotated[X | None, ...])` is `Annotated` and
never a union. 54 protocol fields were therefore described as non-null while
routinely carrying nulls -- ScanSplit's four position/bounds fields, all eight
optional TableInfo columns, six on PlanResponse, FunctionInfo.max_workers,
CatalogInfo.releases[].released_at, and the opaque-data / pushdown / secrets
fields repeated across a dozen request records.

The split is not arbitrary: 139 optional fields WITHOUT an `Annotated` wrapper
were always correct. `Annotated[..., ArrowType(...)]` is required exactly when
the Arrow type cannot be inferred from the Python type -- a pa.Schema or
pa.RecordBatch riding as opaque bytes, a dict serialized to a blob, a narrowed
int -- which is to say every optional payload-carrying field in the protocol.

Nothing here writes different bytes. What changes is that the schema now
describes them, so a peer that compares schemas field by field stops rejecting
correct workers. Both matrix legs pass against the rebuilt C++ client (325/325
subprocess, 325/325 HTTP) and the generated schemas for all five languages are
regenerated in their own repos.

Also fixes java_schemas importing GlobalInitResponse from vgi.protocol, which
re-exports it -- mypy flags the implicit re-export; its home is vgi.invocation.

And stops test_reproducible_vectors_regenerate_identically leaving the working
tree dirty. It regenerates every split-token vector to check the reproducible
ones are stable, but a sealed token draws a fresh random nonce, so its bytes
differ every run. I nearly committed that churn into this commit; the
non-reproducible vectors are now restored afterwards.

NOTE: this cannot be installed until vgi-rpc 0.43.0 is published. The local
co-development path override is left commented in [tool.uv.sources] beside the
existing duckdb one.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: rustyconover

pyproject.toml

@@ -40,7 +40,7 @@ dependencies = [
     "pyarrow",
     "typer>=0.9",
     "platformdirs",
-    "vgi-rpc>=0.40.0",
+    "vgi-rpc>=0.43.0",
     "httpx2>=2.9.1",
 ]
 
@@ -258,6 +258,7 @@ members = ["packages/vgi-fixtures"]
 
 [tool.uv.sources]
 # duckdb = { path = "/path/to/duckdb-python/dist/duckdb-*.whl" }  # local engine-build override
+# vgi-rpc = { path = "../vgi-rpc-python", editable = true }  # local vgi-rpc co-development
 vgi-fixtures = { workspace = true }
 
 [dependency-groups]

tests/test_split_token.py

@@ -192,11 +192,22 @@ def test_reproducible_vectors_regenerate_identically() -> None:
 
     before = {p.name: p.read_bytes() for p in FIXTURES.glob("*.bin")}
     subprocess.run([sys.executable, str(FIXTURES / "generate.py")], check=True, cwd=FIXTURES.parents[2])
-    for case in MANIFEST["cases"]:
-        if not case["reproducible"]:
-            continue
-        name = f"{case['name']}.bin"
-        assert (FIXTURES / name).read_bytes() == before[name], f"{name} drifted"
+    try:
+        for case in MANIFEST["cases"]:
+            if not case["reproducible"]:
+                continue
+            name = f"{case['name']}.bin"
+            assert (FIXTURES / name).read_bytes() == before[name], f"{name} drifted"
+    finally:
+        # Put the NON-reproducible vectors back. A sealed token draws a fresh
+        # random nonce, so regenerating rewrites its bytes every run and leaves
+        # the working tree dirty — which is how unrelated nonce churn ends up
+        # staged in someone else's commit. The reproducible ones are restored
+        # too: they compared equal, so this is a no-op for them.
+        for name, data in before.items():
+            path = FIXTURES / name
+            if path.read_bytes() != data:
+                path.write_bytes(data)
 
 
 # --------------------------------------------------------------------------- #

vgi/codegen/java_schemas.py

@@ -47,14 +47,14 @@
     CatalogAttachRequest,
     CopyFromContext,
     CopyToContext,
-    GlobalInitResponse,
     InitRequest,
     TableBufferingCombineRequest,
     TableBufferingDestructorRequest,
     TableBufferingProcessRequest,
     TableFunctionCardinalityRequest,
     TableFunctionPlanRequest,
 )
+from vgi.invocation import GlobalInitResponse
 from vgi.codegen._common import (
     EXTRA_RESPONSE_TYPES,
     EmittedSchema,