[release] 0.49.0 - New Observability Integration, logging and overall…

… timeout (#370)

### New Features
  - new option observability_client for metrics collection
  - new option overall_init_timeout for timing entire sdk initialization
  ### Improvements
  - now log data source url
  - added support for default environment tier (not currently enabled)
  ### Fixes
  - version in the event metadata is now a string





>Included In This Release
>- 59edbd8 kat-statsig
>   - observability integration (#369)
>- 336f450 sroyal-statsig
>   - Fallback to Default Env from Server (#368)
>- ba9d4ee kat-statsig
>   - logging dcs api with context (#366)
>- afb7486 kat-statsig
>   - strict init timeout and some other fixes (#363)
>- 33e8166 sroyal-statsig
>   - Switch Version Metadata to String (#367)
>- 34a6241 sroyal-statsig
>   - Add Config Version to Exposure Metadata (#365)
>- 1a92749 Xin Li
>   - Create LRS.yml (#362)

statsig/version.py

@@ -1 +1 @@
-__version__ = '0.48.0'
+__version__ = '0.49.0'