Add user agent in bigframes mode (#1152)

Author: jialuoo

dbt-bigquery/.changes/unreleased/Features-20250612-000557.yaml

@@ -0,0 +1,6 @@
+kind: Features
+body: Add user agent in bigframes mode
+time: 2025-06-12T00:05:57.59845537Z
+custom:
+    Author: jialuoo
+    Issue: "1152"

dbt-bigquery/src/dbt/include/bigquery/macros/materializations/table.sql

@@ -143,6 +143,7 @@ df.write \
 {% macro bigframes_write_table(compiled_code, target_relation) %}
 import bigframes.pandas as bpd
 bpd.options.compute.extra_query_labels["bigframes-dbt-api"] = "python-model-table"
+bpd.options.bigquery.application_name = f"dbt-bigquery-{{dbt_version}}"
 bpd.options.bigquery.ordering_mode = "partial"
 bpd.options.bigquery.project = "{{ target.project }}"
 {% if target.location %}