chore: add dependency versions to examples

Author: tokoko

examples/adbc_example.py

@@ -1,7 +1,14 @@
-"""
-Install pyarrow, adbc-driver-manager and duckdb before running this example
-This example  currently can be run only with duckdb<=1.1.3, later vesions of duckdb no longer support substrait in adbc
-"""
+# Install pyarrow, adbc-driver-manager and duckdb before running this example
+# This example  currently can be run only with duckdb<=1.1.3, later vesions of duckdb no longer support substrait in adbc
+# /// script
+# dependencies = [
+#   "pyarrow==20.0.0",
+#   "adbc-driver-manager==1.5.0",
+#   "duckdb==1.1.3",
+#   "substrait[extensions] @ file:///${PROJECT_ROOT}/"
+# ]
+# ///
+
 
 import adbc_driver_duckdb.dbapi
 import pyarrow

examples/duckdb_example.py

@@ -1,6 +1,12 @@
-"""
-Install duckdb and pyarrow before running this example 
-"""
+# Install duckdb and pyarrow before running this example
+# /// script
+# dependencies = [
+#   "pyarrow==20.0.0",
+#   "duckdb==1.2.1",
+#   "substrait[extensions] @ file:///${PROJECT_ROOT}/"
+# ]
+# ///
+
 
 import duckdb
 from substrait.builders.plan import read_named_table, project, filter