Final review fixes M1, M2, M3 and M5 for the workflow storage dedupe:
- M1: a batch also ends after 0.5 s, and the loop leaves the write lock
free for 0.15 s after each committed batch (longer than SQLite's longest
busy poll), so the image monitor and run counting on another connection
get in between. RED: a threaded writer with a 2 s busy timeout hit
"database is locked" (4 of 5 links landed).
- M2: each row runs in its own savepoint. A row that cannot be rewritten
(undecodable text, a text that would not come back) is rolled back alone,
stays inline and is listed in errors; the rest of the batch goes on.
- M3: a reused document is decompressed and checked before its id is handed
out, and repaired from the text (whose hash is its key) when damaged;
verify_database_file reads every document and refuses a damaged one.
- M5: the two legacy generated_images rebuilds refuse a file that already
has the document id columns instead of dropping them.
- The preview names the pre-migration backup and says it is always taken.
Vito Sansevero
96cd973ebd