Prod was hard-down: InitializeJobTrackerAsync threw an unhandled
MySqlException ("Specified key was too long; max key length is 3072
bytes") while creating IX_JobApplications_OwnerUserId_FollowUpAt,
which crashed Program.Main before the app could start (surfaced to
users as a 500 on Google sign-in, but really affected every request).
Root cause: this reconciler assumes OwnerUserId is varchar(255), but
the live column was provisioned wider by an earlier EF migration,
close enough to the utf8mb4 3072-byte limit that pairing it with a
second column tips a composite index over.
Fix:
- Prefix-index OwnerUserId at 191 chars (safe under the legacy
767-byte-per-column limit, still far wider than the GUID-like
Identity ids actually stored) in every composite/unique index that
includes it, so index creation no longer depends on the column's
actual declared width.
- Wrap each CREATE INDEX in try/catch + LogWarning instead of letting
it propagate: a schema reconciler is best-effort and one failed
index must never crash startup, matching the existing non-fatal
pattern already used a few lines below for legacy-schema ownership
claims.
Backend build + full test suite (177 passing) verified green.
cesnimda
bd07876a41