Note

Adds SSE ping support that triggers a flags poll, extracting shared polling logic into a new Requestor and updating data sources and tests accordingly.

• Data sources:
  • Streaming (streaming_data_source.dart): handle ping events; on ping, use Requestor to fetch all flags and emit DataEvent/StatusEvent; supports GET/REPORT; minor logging; exposes httpClientFactory for ping requests.
  • Polling (polling_data_source.dart): refactor to use Requestor for requests; compute method from useReport; fix poll reschedule delay calculation; expose httpClientFactory.
  • New: requestor.dart encapsulates polling request logic (URL building, headers/body, ETag handling, environment ID extraction, error mapping) and returns DataSourceEvent?.
• Client wiring:
  • ld_common_client.dart: build a single PollingDataSourceConfig and pass it to StreamingDataSource for ping-driven polls.
• Tests:
  • Update polling tests to new factory param; verify REPORT headers/body and URLs; confirm interval behavior and env ID extraction.
  • Add streaming ping tests: triggers poll on ping, handles 200/304/error/network cases, and verifies GET vs REPORT.
• Misc:
  • .gitignore: ignore **/devtools_options.yaml.

^{Written by Cursor Bugbot for commit d7e211b. This will update automatically on new commits. Configure here.}