Complete the five-area journal export/import system by adding support for import metadata (hash-based dedup) and config (always staged with diff). - POST /ingest/imports: receives import metadata, deduplicates by content hash, copies new imports, stages ID collisions - POST /ingest/config: receives config snapshot, computes categorized field-by-field diff (identity/preference), always stages with source_config.json + diff.json, never auto-merges - sol export --only imports: scans journal/imports/ for metadata dirs, excludes sync state files (via SYNCABLE_REGISTRY) and source state dirs, sends delta based on manifest - sol export --only config: strips never-transfer fields, sends snapshot - Both areas added to default export sequence (after facets) - Dry-run, state tracking, and decision logs for both areas