Fix Snowflake resync failure due to case mismatch in _resync table suffix (#4184)

The resync suffix was appended in lowercase ("_resync"), producing
mixed-case identifiers like "ACCOUNTS_resync". However, getColsFromTable()
in qrep.go unconditionally applies strings.ToUpper(), converting it to
"ACCOUNTS_RESYNC". Since Snowflake treats quoted identifiers as
case-sensitive, the table lookup fails with "does not exist".

Uppercase the suffix to "_RESYNC" so both creation and query paths
produce consistent identifiers.

Author: kang8

flow/workflows/cdc_flow.go

@@ -594,7 +594,7 @@ func CDCFlowWorkflow(
 		if cfg.Resync {
 			for _, mapping := range state.SyncFlowOptions.TableMappings {
 				if mapping.Engine != protos.TableEngine_CH_ENGINE_NULL {
-					mapping.DestinationTableIdentifier += "_resync"
+					mapping.DestinationTableIdentifier += "_RESYNC"
 				}
 			}
 			// because we have renamed the tables.
@@ -727,7 +727,7 @@ func CDCFlowWorkflow(
 			for _, mapping := range state.SyncFlowOptions.TableMappings {
 				if mapping.Engine != protos.TableEngine_CH_ENGINE_NULL {
 					oldName := mapping.DestinationTableIdentifier
-					newName := strings.TrimSuffix(oldName, "_resync")
+					newName := strings.TrimSuffix(oldName, "_RESYNC")
 					renameOpts.RenameTableOptions = append(renameOpts.RenameTableOptions, &protos.RenameTableOption{
 						CurrentName: oldName,
 						NewName:     newName,