gilesb 647c564c47 Implement atomic publishing with IPFS and DB transactions ...

All publishing operations now use three-phase atomic approach:
1. Phase 1: Preparation - validate inputs, gather IPFS CIDs
2. Phase 2: IPFS operations - pin all content before any DB changes
3. Phase 3: DB transaction - all-or-nothing database commits

Changes:

ipfs_client.py:
- Add IPFSError exception class
- Add add_bytes() to store content on IPFS
- Add add_json() to store JSON documents on IPFS
- Add pin_or_raise() for synchronous pinning with error handling

db.py:
- Add transaction() context manager for atomic DB operations
- Add create_asset_tx() for transactional asset creation
- Add create_activity_tx() for transactional activity creation
- Add get_asset_by_hash_tx() for lookup within transactions
- Add asset_exists_by_name_tx() for existence check within transactions

server.py:
- Rewrite record_run:
  - Check L2 first for inputs, fall back to L1
  - Store recipe JSON on IPFS with CID in provenance
  - Auto-register input assets if not already on L2
  - All operations atomic
- Rewrite publish_cache:
  - IPFS CID now required
  - Synchronous pinning before DB commit
  - Transaction for asset + activity
- Rewrite _register_asset_impl:
  - IPFS CID now required
  - Synchronous pinning before DB commit
  - Transaction for asset + activity

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

2026-01-09 00:59:12 +00:00

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