Guard Y164 search within saved view filters

[Parker-fi]

Summary

• add the Y164 / T6916 API regression case
• create the table, fields, records, and saved filters in code before the checkpoint
• assert the exact record set, row count, and v2 getRecords routing

Local verification

teable-ee ref	Result	Evidence
3f76f9607	Bug reproduced	The view-scoped search returned both target-date-dropped-category and target-date-kept-category; only the kept-category row was expected.
e686cd95d	Pass	The search returned only target-date-kept-category, with row count 1.
822b30e17 (develop at local verification)	Pass	The case completed successfully through the public API.

pnpm check passes with 100 catalog cases.

[CLAassistant]

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