47a4268b9b
Update all documentation files that contained outdated apiKeyEnv references to use the new apiKey approach. ## Changes - docs/architecture.md: Update config example to use apiKey field - docs/wf-stateless-design.md: Update config examples and type definitions to use apiKey instead of apiKeyEnv - docs/builtin-agent-research.md: Update ProviderConfig type definition and code examples All documentation now consistent with the code implementation. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>