v3.18.0
feat(inbound-mail): offload email attachments to S3 to reduce Redis memory fixes NV-7616 (#11053)
feat(api-service): enforce 512-char limit on custom subscription identifiers fixes NV-8216 (#11827)
feat(dashboard): support actor variables in step content editor fixes NV-8143 (#11709)
feat(dashboard): email agent whats-next guide and simplified setup fixes NV-8115 (#11706)
chore(root): apply biome formatter & linter fixes NV-6436 (#8838)
feat(api-service,dashboard): open subscriber access for email agents fixes NV-8212 (#11815)
fix(dashboard): use root dashboard URL for trial inbox marketing CTA fixes NV-8152 (#11726)
fix(shared): remove SMTP TLS requirement assertion fixes NV-8214 (#11820)
feat(api-service,dashboard,dal,shared): implement domain management (#10793)
feat(api-service): implement environment variables management fixes NV-7234 (#10328)