[FR] log sqlite execution time in debug mode

[HansBull]

Is your feature request related to a problem? Please describe.
Slow import on larger collections as in https://discuss.pixls.us/t/slow-image-import-to-a-large-library/22327

Describe the solution you'd like
DT_DEBUG_SQLITE3_PREPARE_V2 logs the query, but not the execution time. Implement a function that measures execution time to facilitate the identiifcation of slow queries and adds ths information to the log. Could require replacing globally sqlite3_step etc with a DT_DEBUG_SQLITE3_STEP macro.

Alternatives
none

Additional context
none

[HansBull]

Won't happen.