## Summary
- **BackfillMissingStandardViewsCommand**: When view validation fails
(e.g. a viewField references a field metadata that doesn't exist in the
workspace), log a warning and skip instead of throwing — so the
workspace upgrade continues with the remaining commands.
- **AddMissingSystemFieldsToStandardObjectsCommand**: Wrap both the
non-tsVector batch migration and each individual tsVector migration in
try-catch. If a field already exists (e.g. duplicate key on `name +
objectMetadataId + workspaceId`), the error is logged as a warning and
the command moves on to the next field.
These errors were observed during the 1.18 → 1.19 production upgrade for
workspaces with non-standard state (missing "owner" field metadata on
Opportunity, or searchVector fields already present with a different
universalIdentifier).
## Test plan
- [ ] Re-run upgrade on the affected production workspaces
- [ ] Verify upgrade completes successfully with warnings instead of
failures
- [ ] Confirm that workspaces which were already upgrading cleanly are
unaffected
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