v1.6.15

Added

• data_adapter — current database adapter type (:sqlite, :mysql2, :postgres)
• data_pool_stats — connection pool metrics (size, available, in_use, waiting)
• data_stats — combined shared + local database statistics
• local_data_stats — local SQLite database statistics
• data_can_read?(table_name) — table read permission check
• data_can_write?(table_name) — table write permission check