## What changed
Include `turn_trigger` from turn metadata in tool, artifact, skill, app, plugin usage, and hook analytics events. Omit the field when no trigger is available.
## Testing
Extend app serialization and reducer tests to check trigger propagation, and verify that MCP tool events retain the trigger after turn completion.
GitOrigin-RevId: 975780983d0761eb34fecf5e8b4abe98a432d0c3
## What changed
Replace `analytics_client_tests.rs` with event-specific suites under
`codex-rs/analytics/src/tests/suite/` and shared fixtures in `tests/support.rs`.
Group turn tests by events, requests, compaction, and accepted lines, and keep
cross-event arrival-order coverage in a dedicated reducer ordering suite.
Separate app and plugin ingestion assertions into their respective suites while
retaining a combined test for arrival order. Document where to place tests based
on the contract they cover.
GitOrigin-RevId: aba497f103ad6e23eca6266fc93d150d16f5913c
Chris Dong