## Summary
The 2.3 `upgrade:2-3:delete-gauge-widgets` workspace command crashed in
production for ~10 workspaces (out of 5000) with:
```
[Error] Cannot read properties of undefined (reading 'configurationType')
at .../2-3-workspace-command-1798000000000-delete-gauge-widgets.command.js:35:164
at Array.filter (<anonymous>)
```
### Root cause
Those workspaces have legacy `pageLayoutWidget` rows whose
`configuration` JSONB does not contain a recognized `configurationType`.
This is consistent with the 1.15 backfill
(`MigratePageLayoutWidgetConfigurationCommand`) only migrating widgets
with the deprecated `graphType` and the `IFRAME` /
`STANDALONE_RICH_TEXT` types — any other widget type that was already
missing `configurationType` (or has a value not in the current enum) was
left as-is.
When the cache is recomputed,
`fromPageLayoutWidgetConfigurationToUniversalConfiguration` switches on
`configuration.configurationType`. With no matching case, the function
falls through and returns `undefined`, so the cached
`widget.universalConfiguration` ends up `undefined`. The gauge filter
then dereferences `.configurationType` and throws.
We can't reproduce the affected data locally, but the symptom uniquely
points at this fall-through path — every other code path either throws
earlier (e.g. when `configuration` itself is null) or yields a defined
`universalConfiguration`.
### Fix
In
`2-3-workspace-command-1798000000000-delete-gauge-widgets.command.ts`:
- Skip widgets whose `universalConfiguration` is `undefined` — by
definition they aren't gauge widgets, so they don't belong in the
deletion set.
- Log them as a warning (id and count) so we still have visibility on
the corrupt rows for follow-up cleanup.
- Use optional chaining when comparing the configuration type so the
filter is robust to the same shape going forward.
The fix is minimal and additive: workspaces without corrupt widgets
behave exactly as before, and the upgrade can now succeed on the
affected workspaces.
## Test plan
- [ ] CI lint + typecheck green
- [ ] Run the upgrade on a healthy workspace locally — gauge widgets are
still deleted, no warnings logged
- [ ] On production, verify the 2.3 upgrade no longer fails on the
affected ~10 workspaces and that the warning logs surface the offending
widget ids for follow-up
## Follow-ups (out of scope of this PR)
- Investigate the corrupt widgets surfaced by the new warning log and
decide whether to backfill / delete them in a dedicated upgrade command
- Consider hardening
`fromPageLayoutWidgetConfigurationToUniversalConfiguration` so the
switch fall-through fails loudly (or returns a sentinel) instead of
silently yielding `undefined`
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