fix: default to 7 days expiration for read_csv, read_json, read_parquet (#193)

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Follow-up to https://togithub.com/googleapis/python-bigquery-dataframes/pull/175/files#r1389686556 🦕

Author: tswast

bigframes/session/__init__.py

@@ -836,11 +836,20 @@ def _read_bigquery_load_job(
             )
 
         self._start_generic_job(load_job)
+        table_id = f"{table.project}.{table.dataset_id}.{table.table_id}"
+
+        # Update the table expiration so we aren't limited to the default 24
+        # hours of the anonymous dataset.
+        table_expiration = bigquery.Table(table_id)
+        table_expiration.expires = (
+            datetime.datetime.now(datetime.timezone.utc) + constants.DEFAULT_EXPIRATION
+        )
+        self.bqclient.update_table(table_expiration, ["expires"])
 
         # The BigQuery REST API for tables.get doesn't take a session ID, so we
         # can't get the schema for a temp table that way.
         return self.read_gbq_table(
-            f"{table.project}.{table.dataset_id}.{table.table_id}",
+            table_id,
             index_col=index_col,
             col_order=col_order,
         )