redash-query-runner-dormant-activatable-via-env

Redash bundles ~70 query runners but only enables those listed in the REDASH_ENABLED_QUERY_RUNNERS environment variable. New connectors register with a module-level register(cls) call against BaseQueryRunner (or BaseSQLQueryRunner / BaseHTTPQueryRunner). For R-Same, the full framework is ported from Redash but only the Snowflake runner is active by default; any of the 70 can be flipped on via config without a rebuild when future data source needs arise.