bc76f62c20
Follow-up on the salvaged commits from PRs #87965 and #87967 (@AiwendilInTheWoods): - Promote the media-send timeout to the standard resolution pattern: HERMES_CRON_MEDIA_SEND_TIMEOUT env var, then cron.media_send_timeout_seconds in config.yaml, then 300s default (mirrors script_timeout_seconds; .env stays secrets-only). - Register the config key in DEFAULT_CONFIG and document both surfaces (environment-variables reference + cron user guide). - Fold the empty-str() exception fallback into the error string recorded in delivery_errors (post-#88631 the reason reaches the run status, not just the log line). - Tests: timeout resolution precedence + TimeoutError reason fallback.