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feat: implement section 11 - span export endpoints (JSON, windowed CSV, BIO-tagged CSV)

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Marko Djordjevic 2026-02-14 10:14:58 +01:00
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openspec/changes/span-annotation/tasks.md
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@ -79,9 +79,9 @@
## 11. Export Endpoints
- [ ] 11.1 Create `GET /api/export/spans?chartId=X&format=json` — Raw Annotations JSON export with full metadata
- [ ] 11.2 Create `GET /api/export/spans?chartId=X&format=windowed` — Windowed Classification CSV with flattened OHLCV columns and configurable `context_padding` (default 10)
- [ ] 11.3 Create `GET /api/export/spans?chartId=X&format=bio` — BIO-tagged CSV with one row per candle, B-{label}/I-{label}/O tagging, multi-label columns for overlapping spans
- [x] 11.1 Create `GET /api/export/spans?chartId=X&format=json` — Raw Annotations JSON export with full metadata
- [x] 11.2 Create `GET /api/export/spans?chartId=X&format=windowed` — Windowed Classification CSV with flattened OHLCV columns and configurable `context_padding` (default 10)
- [x] 11.3 Create `GET /api/export/spans?chartId=X&format=bio` — BIO-tagged CSV with one row per candle, B-{label}/I-{label}/O tagging, multi-label columns for overlapping spans
## 12. Integration Testing & Polish