Fix extract and SQLMesh pipeline to build DuckDB lakehouse

extract: wrap response.content in BytesIO before passing to
normalize_zipped_csv, and call .read() on the returned BytesIO before
write_bytes (two bugs: wrong type in, wrong type out)

sqlmesh: {{ var() }} inside SQL string literals is not substituted by
SQLMesh's Jinja (SQL parser treats them as opaque strings). Replace with
a @psd_glob() macro that evaluates LANDING_DIR at render time and returns
a quoted glob path string.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

transform/sqlmesh_materia/macros/__init__.py

@@ -0,0 +1,10 @@
+import os
+
+from sqlmesh import macro
+
+
+@macro()
+def psd_glob(evaluator) -> str:
+    """Return a quoted glob path for all PSD CSV gzip files under LANDING_DIR."""
+    landing_dir = evaluator.var("LANDING_DIR") or os.environ.get("LANDING_DIR", "data/landing")
+    return f"'{landing_dir}/psd/**/*.csv.gzip'"