v1.9.0

Release build for v1.9.0.

• candela-v1.9.0.apk — phone / tablet (sideload)
• candela-wear-v1.9.0.apk — Wear OS companion ("Library Nocturne"), sideload to the watch
• candela-v1.9.0.aab — Android App Bundle for Play Store upload (#1456)

The two APKs are signed with the project's checked-in keystore (stable since v0.4.15) so the watch ↔ phone Data Layer bridge pairs — sideload-only distribution today. The .aab is release-signed for Play upload only when built on a runner that has the storyvox.release* keystore props (katana); on any other runner it is debug-signed and Play will reject it. Upload to Play Console is still manual (no publisher automation yet).

What's Changed

• feat(plugin-dx): anyone-can-write-a-plugin — source + voice contracts, kits, scaffolds, guides by @jphein in #1488
• fix(notion): child-page-aware chaptering — sub-pages become chapters (#1508) by @jphein in #1510

Full Changelog: v1.8.1...v1.9.0