Round-2 review on PR #893:
- Add test_generate_retries_on_connection_error (generate() shares the transient
retry; guards the decorator against accidental removal).
- Add test_process_document_records_drop_on_exhausted_retries: drives
process_document to retry-exhaustion and asserts record_ingest_dropped is
called once with the classified reason (processor-level coverage, not just the
_drop_reason unit).
- Note in _drop_reason that a multi-failure group is labelled by its first leaf
(best-effort, no "mixed" bucket).
SonarCloud: the quality gate was failing on new_security_hotspots_reviewed
(S5332 "use https") from http:// URLs in the test _req() helpers — switched to
https:// (mirrors commit 98c9d58e).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
