release-v1.18.64

Dev (#7284)

* fix: stock_buffett_index_lg API no longer returns percentile columns (#7282)

The legulegu.com API stopped returning quantileInAllHistory and
quantileInRecent10Years columns. Make column handling dynamic to
avoid KeyError when these columns are absent.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

* fix: fix stock_us_daily

* fix: fix stock_buffett_index_lg

* fix: fix stock_hk_valuation_baidu

* feat: add version 1.18.64

* docs: update date

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Co-authored-by: Zhou Wei <lilaboc.cn@gmail.com>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
Co-authored-by: smartmakeswatch <206515907+smartmakeswatch@users.noreply.github.com>