ksync 0.6.0

ksync syncs OPDS catalogs to a jailbroken Kindle and organizes native ebook formats into Library collections.

• Count only completed downloads and keep cancellation separate from feed errors.
• Honor the catalog setting for TLS certificate verification.
• Serialize status-file writes and preserve live status on duplicate daemon launches.
• Fix child-process waiting in daemon mode.
• Add sync regression tests and GitHub CI for library, WAF, and browser tests.

Install ksync_0.6.0_kindlehf.kpkg with KPM. Existing catalog configuration is preserved on upgrade.

Validation: 40 Rust tests, WAF harness, browser E2E tests, and kindlehf cross-compilation passed. This release was not exercised on a physical Kindle.