- Add `columns` parameter to `get_ohlc_async` and pass through to Iceberg queries
- Replace hardcoded Binance field extraction with declarative `EXCHANGE_OHLCV_EXTENSIONS` config
- Add `applyScale` helper for field-specific transformations (ms_to_ns, price, size, int)
- Support `complementOf` spec for derived fields (e.g., sell_vol from total - buy_vol)
- Apply extensions dynamically in `convertToOHLC` and gap-filling logic
- Remove redundant column filtering in DataAPI (now handled upstream)
- Add model-tags parser for @Tag syntax in chat messages
- Support Anthropic models (Sonnet, Haiku, Opus) via @tag
- Remove Qdrant vector database from infrastructure and configs
- Simplify license model config to use null fallbacks
- Add greeting stream after model switch via @tag
- Fix protobuf field names to camelCase for v7 compatibility
- Add 429 rate limit retry logic with exponential backoff
- Remove RAG references from agent harness documentation
