Cimaise v1.4.0

chore: bump version to 1.1.0

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

fix(mysql): remove CHECK constraint incompatible with MySQL 8.0.16+

MySQL 8.0.16+ doesn't allow CHECK constraints on columns that have
foreign keys with referential actions (ON DELETE SET NULL).
The business rule "only template_id OR custom_template_id can be set"
is now enforced in the application layer instead.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

fix(updater): fail on incomplete update packages instead of warning

Package validation now throws exception when required files are missing
(version.json, app, public) instead of just logging a warning and
returning success. Prevents installing corrupted or incomplete updates.