docs: move DATA-DB-001 to in-progress, update roadmap

docs/roadmap/backlog/DATA-DB-001-databento-historical-price-source.yaml

@@ -1,34 +0,0 @@
-id: DATA-DB-001
-title: Databento Historical Price Source
-status: backlog
-priority: high
-dependencies: []
-estimated_effort: 2-3 days
-created: 2026-03-28
-updated: 2026-03-28
-
-description: |
-  Integrate Databento historical API as a data source for backtesting and scenario
-  comparison pages. This replaces yfinance for historical data on backtest pages
-  and provides reliable, high-quality market data.
-
-acceptance_criteria:
-  - DatabentoHistoricalPriceSource implements HistoricalPriceSource protocol
-  - Cache layer prevents redundant downloads when parameters unchanged
-  - Environment variable DATABENTO_API_KEY used for authentication
-  - Cost estimation available before data fetch
-  - GLD symbol resolved to XNAS.BASIC dataset
-  - GC=F symbol resolved to GLBX.MDP3 dataset
-  - Unit tests with mocked Databento responses pass
-
-implementation_notes: |
-  Key files:
-  - app/services/backtesting/databento_source.py (new)
-  - tests/test_databento_source.py (new)
-  
-  Uses ohlcv-1d schema for daily bars. The cache key includes dataset, symbol,
-  schema, start_date, and end_date. Cache files are Parquet format for fast
-  loading. Metadata includes download_date for age validation.
-
-dependencies_detail:
-  - None - this is the foundation for Databento integration