• Improvement: SES 4.4.7 Message expired (retry-exhaustion) now suppresses on the first event, and any recipient that accumulates 5 consecutive soft bounces with no successful delivery in between is also suppressed; MessageTooLarge/ContentRejected/AttachmentRejected never count (#323).
• Fix: Email AI Assistant setEmailTree tool now declares items on its children array schema, so OpenAI-compatible providers no longer reject the request with array schema missing items (#324). Anthropic was already lenient about this; only OpenAI-compatible endpoints surfaced the error.
• Improvement: /api/templates.compile now accepts and returns subject and subject_preview, rendered through the same Liquid engine used at send time. Previously the API only returned mjml/html, so the console preview drawer rendered the subject in-browser with liquidjs, which could diverge from the Go-side liquidgo output used by the send pipeline. Any API consumer can now retrieve the rendered subject directly (#329).
• Deps: Bumped liquidjs to 10.25.7, postcss to 8.5.14, fast-xml-parser override to ≥5.8.0 (+ new fast-xml-builder ≥1.1.7 override), and github.com/prometheus/prometheus to v0.311.3.