- Multiple changes to make the multichain backtesting possible.
- [The documentation code examples](https://tradingstrategy.ai/docs/programming/index.html#code-examples)
will be updated to reflect multichain support over time and may work incorrectly
at the moment. [Getting Started](https://tradingstrategy.ai/docs/programming/examples/getting-started.html)
tutorial is already updated.
- This is a major release deprecating activity flags in the trading pair universe.
The multichain trading pair data is too big to include inactivate trading pairs (800k+ total trading pairs).
Thus, the pair universe set only contains [active trading pairs](https://tradingstrategy.ai/docs/programming/tracking.html) after this release,
making the trading pair universe less than 100k trading pairs again, making it more feasible to download the data.
- `ExchangeUniverse.get_by_chain_and_slug()` is now canonical way to refer to an exchange
- `PairUniverse.get_pair_by_ticker_by_exchange()` is now canonical way to refer to a trading pair
- Clarify primary keys may not be stable and should no longer referred permanently
- `Exchange.homepage` and `Exchange.active_pair_count` fields added