XLH Preserve DB Bundle 20260703-173336

保守升级包：先备份，不初始化，不清库。正确版本必须到 V157__duty_records_political_identity.sql / DB Flyway 157。

Full preserve-DB bundleUse this first. Contains code, mini-program optional source, plaintext secrets, guides, checksums. Server code packageDocker deployment code. Keeps existing DB/volumes when deployed by runbook. Mini-program optional sourceNot part of server Docker deployment. Plaintext important infoPasswords, production.env, SSH info, admin account. Owner requested plaintext. Guides packageBackup-first deploy, version verification, rollback, prompt. SHA256SUMS.txtChecksums.