push_json_entry and push_json_entry_path silently dropped entries via if let Ok(...) on serde_json::to_value, hiding any future Serialize impl failure as missing files. They now return Result, RunDump::from_projection returns Result<Self>, and the three production callers (pipeline/finalize, lifecycle/git init + checkpoint) report failures via emit_metadata_snapshot_failed with MetadataSnapshotFailureKind::Write.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Move RunDump into fabro-dump so CLI export and retro uploads share the same hydrated run layout. Drop the legacy artifact file-ref parser, add best-effort run.log retrieval for retro, and update retro prompts/docs to use events.jsonl and checkpoints.
