- add .env.example with ingest/config defaults
- warn on missing Alpaca/Databento envs and remove hardcoded Alpaca defaults
- document .env setup in README
- allow .env.example to be tracked
- add Databento options adapter (TS) with Python sidecar and env wiring
- add to stream historical trades and resolve instrument_id -> raw_symbol via symbology
- include Databento + typing_extensions in ingest-options Python requirements
- expose Databento env settings in ingest-options index (dataset/schema/start/end/stype/limit/price scale/python bin)
- update README with Databento replay usage and env docs
- speed up UI replay polling/drain, add per-card replay time display
- stop replay at end and prevent fallback to synthetic by pinning replay to initial trace source
