Naia v0.1.9

Windows v0.1.9 host voice upgrade hotfix.

This supersedes v0.1.8 after RTX 2070 field testing found that an upgrade could reuse structurally valid v0.1.7 Naia Host payload controls. The stale installer prepared only the default reference voice, while the current activation contract required the full eight-voice palette, so installation exited successfully but readiness verification remained incomplete.

v0.1.9:

• compares the installed payload's preparation script and activation contract with the controls packaged by the running Shell;
• atomically restages stale payloads from the verified local 3.7 GB ZIP cache without downloading the runtime archive again;
• requires the current approved reference-voice palette before reporting Naia Host ready;
• reports the exact failed readiness codes instead of only a generic incomplete-verification message; and
• blocks Windows release packaging unless the v0.1.7 default-only payload upgrade regression passes.

Validation:

• RTX 2070 field smoke reported normal installation and Naia Host voice startup;
• Windows release staging and stale-payload regression passed;
• 14 targeted Rust voice tests passed;
• 216 Rust library tests passed;
• the full Shell Vitest suite and production frontend build passed; and
• canonical Tauri packaging produced both NSIS EXE and MSI installers successfully.

Users of v0.1.7 and v0.1.8 should update to v0.1.9.

Manual Windows installers; code signing and automatic updater metadata are not included in this release.