Thread uidv through setup's return value (new uint32 before the cleanup
func) so AckCmd no longer makes a redundant SelectFolder round-trip that
silently returned 0 on failure and recorded acks under the wrong
UID-validity epoch. All four callers updated; read-only callers ignore
the value with _.
- Cap search results to limit (keep most-recent UIDs)
- Propagate io.ReadAll errors from body reads in fetchByUIDSet
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
SQLite PRAGMAs are connection-scoped, but database/sql uses a connection
pool. Without pinning to one connection, new pooled connections won't have
foreign_keys enabled, breaking ON DELETE CASCADE enforcement.
Also mark modernc.org/sqlite as a direct dependency in go.mod.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
steve