add v1.49.0 release note

doc/release/v1.49.0.md

@@ -0,0 +1,16 @@
+[Full Changelog](https://github.com/c9s/bbgo/compare/v1.48.4...main)
+
+ - [#1212](https://github.com/c9s/bbgo/pull/1212): FEATURE: add risk controls for strategies
+ - [#1211](https://github.com/c9s/bbgo/pull/1211): CHORE: bbgo: rename env ENABLE_MARKET_TRADE_STOP to DISABLE_MARKET_TRADE_STOP
+ - [#1206](https://github.com/c9s/bbgo/pull/1206): IMPROVE: improve stop loss methods
+ - [#1210](https://github.com/c9s/bbgo/pull/1210): REFACTOR: move retry functions
+ - [#1209](https://github.com/c9s/bbgo/pull/1209): FEATURE: helm add deployment annotation
+ - [#1208](https://github.com/c9s/bbgo/pull/1208): FIX: add log formatter option and update settings for staging
+ - [#1207](https://github.com/c9s/bbgo/pull/1207): MINOR: [grid2] delete order prices metric
+ - [#1205](https://github.com/c9s/bbgo/pull/1205): FIX: [xalign] add balance fault tolerance range
+ - [#1204](https://github.com/c9s/bbgo/pull/1204): FIX: typo in xalign config
+ - [#1203](https://github.com/c9s/bbgo/pull/1203): FEATURE: pass deployment labels to pod
+ - [#1202](https://github.com/c9s/bbgo/pull/1202): FIX: [xgap] fix group id range
+ - [#1201](https://github.com/c9s/bbgo/pull/1201): FIX: typo in helm chart additionalLabels
+ - [#1200](https://github.com/c9s/bbgo/pull/1200): CHORE: release helm chart
+ - [#1199](https://github.com/c9s/bbgo/pull/1199): FEATURE: allow additional labels