fix(sessions): validate and normalize threadId before persisting session

fix(memory-db): enforce deterministic FTS ordering and dedupe touched memory ids

fix(concurrency): keep channel queue alive after previous task failure

feat(observability): include messageId in rate-limit log events

feat(observability): add channelId to memory selection and injection logs

feat(observability): include user and message context in large response logs

feat(observability): add userId and messageId to run and outer error logs

feat(observability): include channelId in prompt memory retrieval error logs

feat(memory-commands): handle invalid mem commands with help text and structured logging

feat(observability): log memory command name and execution time when handled

feat(observability): add structured logs for empty mentions and memory-command handling

feat(observability): log ignored and rate-limited messages with run context

fix(observability): create runId before try/catch and enrich startup/error logs

refactor(observability): generate runId at message entry and propagate through orchestrator

feat(observability): include stack trace in unhandled rejection logs