[codex] Harden plugin notification handling

[Pigbibi]

Summary

• consume shared strategy plugin notification i18n from QuantPlatformKit
• keep local fallback labels while avoiding mixed-language route reasons
• log Telegram transport failures by exception type only
• update QuantPlatformKit pin to d26e8019a0d7d9f1947a0e11bf8829520db60c98

Validation

• PYTHONPATH=/home/ubuntu/Projects/QuantPlatformKit/src:. python -m py_compile notifications/telegram.py scripts/execution_report_heartbeat.py scripts/cloud_run_runtime_guard.py