feat(openapi): upgrade to 3.1 with nullable types, UUID, and base64

fix(parser): resolve unaliased imports by declared package name

feat(parser): enrich OpenAPI with auth, validation, enums, and unique…

… operationIds

feat(web): add backend version endpoint and show version in UI header

feat(web): add backend version endpoint and show version in UI header

feat: add gswr upgrade command

feat: auto-discover func main and add generate subcommand

feat: enhance response schema with time fields and update related par…

…sing logic

fix: echo.QueryParamOr[int]

feat: enhance parser with embedded struct handling and schema resolution