Use utf8mb4_unicode_ci in base SQL (MariaDB lacks utf8mb4_0900_ai_ci).
Add Updates.ExceptionShutdownDelay to dbimport.conf.dist to match
DBUpdater expectations.
MariaDB rejects 34149345 for VerifiedBuild when the column is MEDIUMINT
(signed max 8388607), as in old 8.x schema migrations. Replace corrupt
value with 0 in archive and base dumps.
Add data/sql/tools/clamp_verifiedbuild_mediumint.py to re-scan archive,
updates, and base INSERT/UPDATE blocks that list VerifiedBuild.
Co-authored-by: Cursor <cursoragent@cursor.com>