Align shared runtime strategy docs

[Pigbibi]

Summary

This updates shared strategy docs and notification localization to match the six runtime-enabled US equity profiles.

Cause and effect

QuantPlatformKit still listed removed research profiles in platform matrices and switch runbooks. That made the shared operator docs disagree with the strategy catalog and platform runtime support.

Fix

• remove dynamic Top20, aggressive Top50, and dynamic mega leveraged pullback from shared platform matrices and switch runbooks
• update the cross-platform strategy spec to retain Top50 balanced as the mega-cap runtime path
• remove stale shared notification replacements for removed strategy names

Validation

• PYTHONPATH=src ../PaperSignalPlatform/.venv/bin/python -m pytest tests/test_notification_localization.py -q
• /home/ubuntu/Projects/TelegramCodexCCBot/.venv/bin/ruff check src/quant_platform_kit/common/notification_localization.py tests/test_notification_localization.py
• git diff --check

Note: generated src/quant_platform_kit.egg-info is intentionally not included in this PR.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Delete orphaned rationale after removing Example E

After the 示例 E section was removed, a second 原因 block remains and now has no owning example while still describing behavior specific to the deleted dynamic mega-cap profile. In docs/us_equity_live_switch_runbook.zh-CN.md, this leaves contradictory operator guidance in the LongBridge SG switch flow and can mislead readers into applying snapshot/runtime assumptions for a profile that is no longer in the supported runbook set.

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