Bump the client version in package.json (+lock), tauri.conf.json and
Cargo.toml (+lock) so release.yml's verify-versions gate passes and
deployed clients see the update; refresh the literal version in the
README and docs build examples; add the curated CHANGELOG entry covering
the 199 verified defects fixed since v1.2.0-alpha.2 (#1366-#1375), the
observability/backup/deployment hardening in #1376, migration 031, and
the new config keys.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>