docs: link long-session diagnostics from release news

[LauraGPT]

Summary

• link the v1.3.19 README news item directly to the long-session diagnostics section
• update the Chinese README news item with the same direct diagnostics link
• correct repository_roles docs: 即時轉錄一段時間後會自行斷線 #3101 is still open waiting for reporter retest logs, while fixes and diagnostics have shipped

Validation

• asserted README links to the English and Chinese long-session diagnostics anchors
• verified 即時轉錄一段時間後會自行斷線 #3101 is currently OPEN with bug/deployment/needs feedback labels
• curl checks for diagnostics anchors, v1.3.19 release, PyPI 1.3.19, and 即時轉錄一段時間後會自行斷線 #3101 returned 200
• git diff --check

[gemini-code-assist]

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