Error handling: Isolate error messages from their originating exception

[bgaidioz]

If getting an INVALID_ARGUMENT error, the DETAIL includes a field called message that contains the details() string of the gRPC error, which is what the DASSdk exception message is: e.g.

if (v.getYear <= 2000) {
   throw new IllegalArgumentException(s"Invalid date: $v (only > 2000 supported)")
}

leads to this in the dictionary:

`"message": "Invalid date: year: 1999\nmonth: 1\nday: 1\n (only > 2000 supported)"`

The cause field is the full string representation of the originating exception:

ERROR:  Invalid argument
DETAIL:  {"code": "INVALID_ARGUMENT", "message": "Invalid date:
year: 1999\nmonth: 1\nday: 1\n (only > 2000 supported)", "das_name":
"localhost:50051", "das_type": "mock", "das_url": "localhost:50051",
"table_name": "events", "cause": "<_InactiveRpcError of RPC that
terminated with:\n\tstatus = StatusCode.INVALID_ARGUMENT\n\tdetails
= \"Invalid date: year: 1999\nmonth: 1\nday: 1\n (only > 2000
supported)\"\n\tdebug_error_string = \"UNKNOWN:Error received from
peer  {created_time:\"2025-02-26T15:06:31.645698+01:00\", grpc_status:3,
grpc_message:\"Invalid date: year: 1999\\nmonth: 1\\nday: 1\\n (only
> 2000 supported)\"}\"\n>"}

Same with PERMISSION_DENIED, UNAUTHENTICATED and UNIMPLEMENTED:

ERROR:  Permission denied
DETAIL:  {"code": "UNSUPPORTED_OPERATION", "message": "unsupported
operation", "das_name": "localhost:50051", "das_type": "mock",
"das_url": "localhost:50051", "table_name": "small", "cause":
"<_InactiveRpcError of RPC that terminated with:\n\tstatus =
StatusCode.UNIMPLEMENTED\n\tdetails = \"unsupported
operation\"\n\tdebug_error_string = \"UNKNOWN:Error received from
peer  {created_time:\"2025-02-26T15:37:37.095474+01:00\", grpc_status:12,
grpc_message:\"unsupported operation\"}\"\n>"}

ERROR:  Unauthenticated
DETAIL:  {"code": "UNAUTHENTICATED", "message": "Wrong password",                                                                                                                                   
"das_name": "localhost:50051", "das_type": "mock", "das_url":
"localhost:50051", "table_name": "events", "cause": "<_InactiveRpcError
of RPC that terminated with:\n\tstatus =
StatusCode.UNAUTHENTICATED\n\tdetails = \"Wrong
password\"\n\tdebug_error_string = \"UNKNOWN:Error received from
peer  {created_time:\"2025-02-26T15:16:37.598023+01:00\", grpc_status:16,
grpc_message:\"Wrong password\"}\"\n>"}

ERROR:  Unsupported operation
DETAIL:  {"code": "UNSUPPORTED_OPERATION", "message": "unsupported
operation", "das_name": "localhost:50051", "das_type": "mock",
"das_url": "localhost:50051", "table_name": "small", "cause":
"<_InactiveRpcError of RPC that terminated with:\n\tstatus =
StatusCode.UNIMPLEMENTED\n\tdetails = \"unsupported
operation\"\n\tdebug_error_string = \"UNKNOWN:Error received from
peer  {created_time:\"2025-02-26T15:37:37.095474+01:00\", grpc_status:12,
grpc_message:\"unsupported operation\"}\"\n>"}