Task 4 (bfcdbb5) compiles and passes all 32 tests on the build host; only
clippy -D warnings blocked CI. Fixed the two denials:
- rate_limit.rs: converted a dangling /// doc block (no documented item) to //
to clear clippy::empty_line_after_doc_comments
- db/events.rs: #[allow(dead_code)] on CONNECTION_REJECTED_EXPIRED_CODE and
_CANCELLED_CODE (not-yet-wired audit-event constants), matching the file's
existing STREAMING_STOPPED pattern; TODO comments note the rejection-event wiring
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>