feat(transport): add RabbitMQ incoming and outgoing transports

docs: plan rabbitmq transport change

docs: enrich OpenSpec project context and artifact rules

docs: add OpenSpec capability specifications

chore: add OpenSpec spec-driven development integration

feat(core): support fully-qualified keys in log-levels config

feat(core): validate log-levels config at startup

docs: clarify per-event log level thresholds as suppression

fix(spring): defer lifecycle persistence until after commit

fix(spring): complete publication future exceptionally on rollback

feat(core): manual retry bypasses updated-at cutoff

feat(core): dialect-aware BOOLEAN columns for Oracle and SQL Server

fix(core): read stored timestamps in UTC

test(core): cover envelope channel persistence gaps

fix(core): manual retries do not increment retry counter

feat(core): persist envelope channels as local routing metadata for retry

fix(core): require service in EventRetryScheduler to retry only own events

docs: add 1.2.3 entry to CHANGELOG

release: bump to 1.2.3

fix(core): respect Event interface channels() override in Envelope

docs: add 1.2.1 and 1.2.2 entries to CHANGELOG

docs: add 1.2.1 and 1.2.2 entries to CHANGELOG

release: bump to 1.2.2 and upgrade Jackson to 2.22.1 to fix vulnerabilities

release: bump to 1.2.2 and upgrade Jackson to 2.22.1 to fix vulnerabilities