cog

889a55f7 - feat: add legacy SDK fallback for schema generation and coglet installation

feat: add legacy SDK fallback for schema generation and coglet installation When SDK version is explicitly pinned below 0.17.0 (e.g. COG_SDK_WHEEL=pypi:0.16.12), fall back to runtime schema generation and skip coglet installation: - Add GenerateCombined() to merge predict+train schemas (fixes missing /trainings) - Add canUseStaticSchemaGen() with binary availability check (graceful fallback) - Add isLegacySDK() to skip coglet for SDK < 0.17.0 - Add DetectLocalSDKVersion() to resolve SDK version from dist/ wheels - Restore GenerateOpenAPISchema() for legacy Docker-based schema generation - Add legacy_sdk_schema integration test