Replace the NO-OP importToJSONLWithStore() stub with full implementation:
- Reads and parses JSONL file line by line using bufio.Scanner
- Uses importIssuesCore() with auto-collision resolution enabled
- Integrates with existing import infrastructure
- Fixes PRIMARY root cause of bd-160 multi-clone sync failure
The daemon now properly imports remote changes pulled from git instead
of ignoring them, allowing databases to converge across clones.
Amp-Thread-ID: https://ampcode.com/threads/T-9b92c2dc-e0e2-4d77-b562-136da8c3f64e
Co-authored-by: Amp <amp@ampcode.com>