space_gen

Continue iterating space_gen against real OpenAPI specs. Each PR closes one gap surfaced by a real spec — could be an `UnimplementedError` stub, ugly generated Dart, a broken edge case, a missing feature, a lint that fires on generated code, anything that prevents the output from reading as cleanly as handwritten Dart. Bar: best-in-class Dart OpenAPI/Swagger generator. Use when asked to "continue space_gen work", "next gap to fix", "what should we improve next", "pick something to work on", or any spec-driven follow-up.

Prepare a space_gen release: determine the next version, generate a CHANGELOG section from merged PRs since the last tag, bump pubspec.yaml, verify, commit, tag. Use when asked to "release", "cut a release", "prepare a release", "bump the version", or "ship 1.x.y". User-triggered only — do not invoke proactively.