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

.speakeasy/gen.lock

@@ -3,10 +3,10 @@ id: cfd52247-6a25-4c6d-bbce-fe6fce0cd69d
 management:
   docChecksum: b1b97e85c6e3464e1fd6e2163c4ebc87
   docVersion: 1.0.0
-  speakeasyVersion: 1.658.1
-  generationVersion: 2.755.6
-  releaseVersion: 0.0.16
-  configChecksum: bccceb456c96a46bcbe65fdff6bd5e1f
+  speakeasyVersion: 1.658.2
+  generationVersion: 2.755.9
+  releaseVersion: 0.0.18
+  configChecksum: 4386d334ab676d900bdb35b056f15169
   repoURL: https://github.com/OpenRouterTeam/python-sdk.git
   installationURL: https://github.com/OpenRouterTeam/python-sdk.git
   published: true
@@ -15,7 +15,7 @@ features:
     acceptHeaders: 3.0.0
     additionalDependencies: 1.0.0
     constsAndDefaults: 1.0.5
-    core: 5.23.8
+    core: 5.23.9
     defaultEnabledRetries: 0.2.0
     deprecations: 3.0.2
     devContainers: 3.0.0