fetch_historical_feature_values: unquoted BigQuery table name fails for project IDs like my-proj-5bb0 #7280

Environment

• google-cloud-aiplatform 1.165.1 and 2.7.0
• vertexai.resources.preview.feature_store.offline_store.fetch_historical_feature_values

Problem

_feature_to_data_source in vertexai/resources/preview/feature_store/offline_store.py builds the feature source query as

f"FROM {fully_qualified_table}"

without backticks. BigQuery cannot parse an unquoted project ID whose segment after a dash starts with a digit, such as my-proj-5bb0, so the point-in-time query fails:

google.api_core.exceptions.BadRequest: 400 Syntax error: Expected ")" but got "bb0"

Steps to reproduce

1. In a project whose ID has a dash followed by a digit-leading segment (for example my-proj-5bb0), create a FeatureGroup over bq://my-proj-5bb0.dataset.view and register features.
2. Call offline_store.fetch_historical_feature_values(entity_df=..., features=[...]).

Expected

The query quotes the table reference:

f"FROM `{fully_qualified_table}`"

With that change the query runs and returns the expected point-in-time rows.

Workaround

Call with dry_run=True, add backticks around the table name in the printed query, and run it with bigframes.pandas.read_gbq_query.