[Justice Counts] Replace INVALID_CHILD_AGENCY error with UNEXPECTED_E…

…RROR (Recidiviz/recidiviz-data#29387)

## Description of the change

Replace INVALID_CHILD_AGENCY error with UNEXPECTED_ERROR.

The codebase is configured right now to send a INVALID_CHILD_AGENCY
error when we experience an error that we don't know how to handle.

This INVALID_CHILD_AGENCY is misleading, and it seems like it's an
accident where it is. Let's replace it with a more straightforward
UNEXPECTED_ERROR error. This is an improvement because it tells us more
directly that we are not handling the error properly - instead of
leading us down the wrong path by suggesting something is up with our
child agency logic.

## Testing
I tested this locally and got the unexpected error message below.

<img width="967" alt="Screenshot 2024-04-26 at 10 17 28 AM"
src="https://github.com/Recidiviz/recidiviz-data/assets/130382407/f428a24b-fb79-48b3-8aaf-af7235aadda7">

Zenhub Ticket Recidiviz/recidiviz-data#29303

GitOrigin-RevId: 10ac0975afe116189831f9129b4ef98a4f775703

recidiviz/justice_counts/bulk_upload/spreadsheet_uploader.py

@@ -43,7 +43,11 @@
 from recidiviz.justice_counts.metrics.metric_interface import MetricInterface
 from recidiviz.justice_counts.report import ReportInterface
 from recidiviz.justice_counts.types import DatapointJson
-from recidiviz.justice_counts.utils.constants import INVALID_CHILD_AGENCY, UploadMethod
+from recidiviz.justice_counts.utils.constants import (
+    INVALID_CHILD_AGENCY,
+    UNEXPECTED_ERROR,
+    UploadMethod,
+)
 from recidiviz.persistence.database.schema.justice_counts import schema
 from recidiviz.persistence.database.schema.justice_counts.schema import (
     ReportingFrequency,
@@ -875,7 +879,7 @@ def _handle_error(
                 description=(
                     e.message  # type: ignore[attr-defined]
                     if hasattr(e, "message")
-                    else INVALID_CHILD_AGENCY
+                    else UNEXPECTED_ERROR
                 ),
             )
         e.sheet_name = sheet_name

recidiviz/justice_counts/utils/constants.py

@@ -26,6 +26,8 @@
 
 INVALID_CHILD_AGENCY = "INVALID_CHILD_AGENCY"
 
+UNEXPECTED_ERROR = "UNEXPECTED_ERROR"
+
 AUTOMATIC_UPLOAD_ID = -1
 
 # Unsubscribe group ID number for SendGrid for Justice Counts