Registered users get snowflake ids above JS MAX_SAFE_INTEGER.
/user-info emitted them as JSON numbers and login stored uint64 in
the session. Both now use decimal strings. Tests cover admin vs
non-admin cookie access to /user/self, /user-info, and /upload/my.
- Relocated go.mod and go.sum into backend/ root directory
- Stripped redundant backend/ segments from all Go imports (github.com/Rain-kl/Wavelet/...)
- Unified Makefile, swagger, and build-test to execute in backend/ module context
- Ensured 100% build-test, code-check, format, and swagger pass