## Summary
Prod deploy of v2.5.0 fails with a query failure inserting into
`core.upgradeMigration`:
```
query failed: INSERT INTO "core"."upgradeMigration" ("id", "name", "status", "attempt", "executedByVersion", "errorMessage", "isInitial", "workspaceId", "createdAt")
VALUES (DEFAULT, $1, $2, $3, $4, $5, DEFAULT, $6, DEFAULT),
(DEFAULT, $7, $8, $9, $10, $11, DEFAULT, $12, DEFAULT),
... (continues past $2515) ...
```
### Root cause
`UpgradeMigrationService.recordUpgradeMigration` writes one row per
workspace via a single `repository.save([...rows])` call.
`UpgradeMigrationEntity` has **6 user-provided columns** per row
(`name`, `status`, `attempt`, `executedByVersion`, `errorMessage`,
`workspaceId`), so the multi-row INSERT binds `6 * (1 + N_workspaces)`
parameters.
Postgres' wire protocol caps a single statement at **65,535 bind
parameters** (16-bit count). That gives a hard ceiling of ~10,920 rows
per call. Production has enough workspaces to overflow.
