dalgo2bigquery v0.1.0

Initial Go analytical driver release for the accepted DataTug BigQuery contract.

Includes bounded native-table metadata validation, restricted typed query compilation, dry-run approval bindings, capped single submission, durable budget and cursor state, lossless result decoding, and bounded status/cancellation. Operator identity and policy are injected. The operator-server example composes the driver with explicit trusted configuration.

Validation: 168-case contract corpus, race-enabled tests, Linux/macOS/Windows CI, and independent correction review. A trusted dependency that never physically returns can retain one of the bounded worker slots until process exit; unknown paid reservations remain conservative.

This module release does not claim completed DataTug CLI integration, JavaScript parity, public-source admission, or live operator/browser acceptance. Those remain separate programme gates.