Rename _sync_root_safely, _prune_orphans_safely, _collect_paths_for_roots,
_build_asset_specs, and _insert_asset_specs to remove underscore prefix
since they are used by seeder.py as part of the public API.
Amp-Thread-ID: https://ampcode.com/threads/T-019c3037-df32-7138-99d8-b4b824d896b3
Co-authored-by: Amp <amp@ampcode.com>
- Remove automatic pruning from scan loop to prevent partial scans from
deleting assets belonging to other roots
- Add get_all_known_prefixes() helper to get prefixes for all root types
- Add prune_orphans() method to AssetSeeder for explicit pruning
- Add prune_first parameter to start() for optional pre-scan pruning
- Add POST /api/assets/prune endpoint for explicit pruning via API
- Update main.py startup to use prune_first=True for full startup scans
- Add tests for new prune_orphans functionality
Fixes issue where a models-only scan would delete all input/output assets.
Amp-Thread-ID: https://ampcode.com/threads/T-019c2ba0-e004-7229-81bf-452b2f7f57a1
Co-authored-by: Amp <amp@ampcode.com>
- Add AssetSeeder singleton class with thread management and cancellation
- Support IDLE/RUNNING/CANCELLING state machine with thread-safe access
- Emit WebSocket events for scan progress (started, progress, completed, cancelled, error)
- Update main.py to use non-blocking asset_seeder.start() at startup
- Add shutdown() call in finally block for graceful cleanup
- Update POST /api/assets/seed to return 202 Accepted, support ?wait=true
- Add GET /api/assets/seed/status and POST /api/assets/seed/cancel endpoints
- Update test helper to use ?wait=true for synchronous behavior
- Add 17 unit tests covering state transitions, cancellation, and thread safety
- Log scan configuration (models directory, input/output paths) at scan start
Amp-Thread-ID: https://ampcode.com/threads/T-019c2b45-e6e8-740a-b38b-b11daea8d094
Co-authored-by: Amp <amp@ampcode.com>
