feat(bigquery-jdbc): record errors and flush on batchSizeThreshold

[Neenu1995]

Driver environment

• Wire DriverEnvironmentDetector.build() into the telemetry config .
• Rename DriverEnvironmentBuilder -> DriverEnvironmentDetector; report
  DRIVER_NAME as Google-BigQuery-JDBC-Driver.
• Fall back to a random UUID on any RuntimeException while persisting the
  telemetry tag, not just SecurityException.

SQLState emission

• Add BigQueryJdbcSqlStates (11 SQL:2003 constants) and
  BigQueryJdbcExceptionUtils.sqlStateForCause(), mapping BigQuery reason
  values onto standard states with an HY000 default.
• All BigQueryJdbcException constructors now set a SQLState; the
  InterruptedException overload reports 57014.
• BigQueryConversionException -> 22000, feature-not-supported -> 0A000,
  syntax error -> 42000.
• Fix BigQueryJdbcSqlSyntaxErrorException(BigQueryException), which passed
  "Incorrect SQL syntax." into the SQLState parameter and dropped the cause.
• Delete unused BigQueryJdbcCoercionException and
  BigQueryJdbcCoercionNotFoundException.

Error metrics

• Add TelemetryManager.extractXdbcCode(): first numeric SQLState in the cause
  chain, 0 when none.
• Record errors in BigQueryJdbcContextProxy at the InvocationTargetException
  boundary, before throw cause, leaving the exception unchanged.

Batching

• Flush on queue size at batchSizeThreshold, dispatched to the batcher thread
  so no caller thread does network I/O.
• Derive the unique-profile cap as 2 x batchSizeThreshold (fallback 3000),
  preserving threshold < cap.
• Suppress the size trigger while flushes are failing; reschedule() continues
  to space retries.

[gemini-code-assist]

Warning

Gemini encountered an error creating the review. You can try again by commenting /gemini review.