Move duckdb from install deps to the develop extra

It is only used by the test suite, not by any runtime module.

Signed-off-by: Pascal Tomecek <40371786+ptomecek@users.noreply.github.com>

Author: ptomecek

pyproject.toml

@@ -35,7 +35,6 @@ dependencies = [
     "boto3",
     "cloudpickle",
     "deltalake",
-    "duckdb",
     "narwhals",
     "numpy",
     "orjson",
@@ -59,6 +58,7 @@ develop = [
     "check-dist",
     "cibuildwheel",
     "codespell",
+    "duckdb",
     "hatch-rs",
     "hatchling",
     "mdformat",