Bump workspace and backend module to Go 1.26 to satisfy module toolchain requirements and allow dependency tooling (Renovate) to run. Regenerated backend module checksums.
- Implemented SystemPermissionsHandler to check and repair file permissions.
- Added endpoints for retrieving and repairing permissions.
- Introduced utility functions for permission checks and error mapping.
- Created tests for the new handler and utility functions.
- Updated routes to include the new permissions endpoints.
- Enhanced configuration to support new logging and plugin directories.
Caddy 2.10.2 requires Go 1.25 (declared in its go.mod). The previous
commit incorrectly downgraded to Go 1.23 based on the false assumption
that Go 1.25.5 doesn't exist.
This fix:
- Updates Dockerfile Go images from 1.23-alpine to 1.25-alpine
- Updates backend/go.mod to go 1.25
- Updates go.work to go 1.25
Fixes CI Docker build failures in xcaddy stage.
