docs: add Python v2 SDK PR #841 reference

Add link to in-progress Python v2 SDK work (coinbase/x402#841)
in Python documentation files.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Ilevk

docs/python/README.en.md

@@ -13,6 +13,7 @@
 > Released December 2025, modular SDK based
 
 - [v2/](v2/) - Python v2 Documentation (Coming Soon)
+- 🚧 **Python v2 SDK In Progress**: [PR #841](https://github.com/coinbase/x402/pull/841)
 
 ### v1 (Legacy)
 

docs/python/README.md

@@ -13,6 +13,7 @@
 > 2025년 12월 출시, 모듈형 SDK 기반
 
 - [v2/](v2/) - Python v2 문서 (준비 중)
+- 🚧 **Python v2 SDK 작업 중**: [PR #841](https://github.com/coinbase/x402/pull/841)
 
 ### v1 (Legacy)
 

docs/python/v2/README.en.md

@@ -29,7 +29,8 @@
 
 ## v2 Examples (In Progress)
 
-> v2 Python examples are currently being prepared in the official repository.
+> 🚧 **Python v2 SDK In Progress**: [PR #841](https://github.com/coinbase/x402/pull/841)
+>
 > TypeScript examples are available at [official repository](https://github.com/coinbase/x402/tree/main/examples/typescript).
 
 ### TypeScript Examples

docs/python/v2/README.md

@@ -29,7 +29,8 @@
 
 ## v2 예제 (준비 중)
 
-> v2 Python 예제는 현재 공식 레포지토리에서 준비 중입니다.
+> 🚧 **Python v2 SDK 작업 중**: [PR #841](https://github.com/coinbase/x402/pull/841)
+>
 > TypeScript 예제는 [공식 레포지토리](https://github.com/coinbase/x402/tree/main/examples/typescript)에서 확인할 수 있습니다.
 
 ### TypeScript 예제