uniqc.backend_adapter.config module

Backward-compatible import path for UnifiedQuantum configuration.

Configuration is now a project-level concern exposed as uniqc.config. This module remains the implementation and legacy import path during the compatibility window because older code imports uniqc.backend_adapter.config.

Note: CONFIG_FILE and the top-level symbols (CONFIG_DIR, DEFAULT_CONFIG, SUPPORTED_PLATFORMS, META_KEYS) are imported from uniqc.config first so that patching uniqc.config.CONFIG_FILE propagates here. All other symbols are then re-exported from uniqc.config.