Add workaround for DuckDB v1.5.0 stdin bug

DuckDB CLI v1.5.0 has a bug that causes it not to execute scripts that
are piped to stdin. The bug only occurs when stdout is a TTY (in that
code path, DuckDB colorizes its output). So the workaround is to pipe
duckdb's output through cat.

References:
duckdb/duckdb#21253
https://duckdb.org/docs/current/guides/troubleshooting/command_line

Author: jake-low

postprocess.sh

@@ -2,7 +2,7 @@
 
 echo $@
 
-duckdb << EOF
+duckdb << EOF | cat # workaround for https://github.com/duckdb/duckdb/issues/21253
 LOAD SPATIAL;
 
 COPY (