Add a new DB2 REST endpoint to the project. For the given endpoint:

1. **Models**: Create/update structs in `src/models/`
   - Raw struct with `#[serde(rename = "UPPERCASE")]` fields
   - Normalized struct with idiomatic Rust names
   - `From<Raw>` impl that trims strings and handles defaults

2. **Service method**: Add to `src/api/services.rs`
   - Typed method on `OpusrServices`
   - Correct positional parameters (P1, P2, ...)
   - Map raw response to normalized types

3. **CLI command**: Add subcommand variant to `src/config/settings.rs`
   - Implement handler in `main.rs`
   - Support both JSON and table output

4. **Tests**: Write tests in `tests/`
   - Mock server with `wiremock`
   - Test success, empty result, error cases

5. Run `/qa-cycle` to validate everything