chore: regenerate Python SDK v0.0.17

Update Python SDK with Speakeasy regeneration:
- Bump version from 0.0.16 to 0.0.17
- Refactor OpenAPI schema definitions:
  - Inline BigNumberUnion type into usage sites
  - Reorganize ProviderName enum location
  - Simplify provider order/only/ignore array types
  - Add plugins schema definitions
- Update gen.lock with new configChecksum

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "openrouter"
-version = "0.0.16"
+version = "0.0.18"
 description = "Official Python Client SDK for OpenRouter."
 authors = [{ name = "OpenRouter" },]
 readme = "README-PYPI.md"
@@ -11,6 +11,7 @@ dependencies = [
     "pydantic >=2.11.2",
 ]
 urls.repository = "https://github.com/OpenRouterTeam/python-sdk.git"
+license = { text = "Apache-2.0" }
 
 [dependency-groups]
 dev = [