Roadmap P1: make long runs recoverable and retryable

[WalksWithASwagger]

Context

Long WhisperForge runs can involve transcription, several LLM stages, optional images, Notion save, markdown export, and history writes. Today too much of that is session-state-only, which makes interruption/retry behavior fragile.

Scope

• Add a stable local run ID.
• Checkpoint intermediate stage outputs under .cache/runs/<run_id>/ or an equivalent ignored artifact path.
• Allow retrying Notion save, markdown export, and image generation without rerunning the entire pipeline.
• Attach cost/token/cache/model/settings/source metadata before save.

Acceptance criteria

• A partially completed run can be inspected from local artifacts.
• Save/export retry does not duplicate or corrupt history unexpectedly.
• Run history can link to local artifacts as well as Notion URLs.
• Tests cover the run-record/checkpoint behavior.

Verification

• venv/bin/python -m pytest tests/ -q
• Manual or automated run-interruption/retry smoke documented in STATUS.md

Refs ROADMAP.md Phase 3.

[WalksWithASwagger]

Swarm lane started for BC-83 from the current roadmap order. Scope is a bounded run-recovery foundation: local run artifacts/checkpointing plus save/export retry metadata, with focused tests. Existing PR lanes (#9/#10/#11) are being reviewed in parallel.

[WalksWithASwagger]

BC-83 implementation PR is open: #12 (stacked on #10).\n\nWhat it adds:\n- stable .cache/runs/<run_id>/ manifests and stage checkpoints\n- retry-safe history upserts keyed by run_id\n- Recent runs artifact links plus markdown/Notion export recording\n- focused tests for artifacts, checkpoints, and history upsert behavior\n\nVerification: make test -> 177 passed; make eval-fixture; make smoke; tests/ui_smoke.py; json.tool; git diff --check.\n\nLeaving file-based resume/reopen UI as a follow-up on top of this artifact layer.

[WalksWithASwagger]

Merged in the roadmap swarm closeout on main. Verification covered the relevant PR stack before merge; see merged PRs #9, #10, and #12 for the detailed gates.