* samples: update publishing samples to clarify that topic objects should be cached; also fix a usage of publish()

* samples: convert publishWithRetrySettings to use veneer

* samples: update publishWithRetrySettings with new defaults; add comment about including all items

* docs: clarify what subscriber batching means

* samples: update EOD sample with endpoint

* samples: add comments about ordered publishing as well

* Delete .github/ISSUE_TEMPLATE/bug_report.md

* Delete .github/ISSUE_TEMPLATE/feature_request.md

* Delete .github/ISSUE_TEMPLATE/question.md

… to match main package (#1995)

* feat: Add IngestionFailureEvent to the external proto

PiperOrigin-RevId: 684152766

Source-Link: googleapis/googleapis@d992b06

Source-Link: googleapis/googleapis-gen@f7405e1
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