fix(capabilities): list only SQLSTATE codes this engine emits

42P01/42703 appeared in the document but the engine currently reports
undefined table/column failures as XX000. Add the managed-proxy codes for TLS
required (08P01) and connection quota (53300) instead.

pkg/capabilities/capabilities.go

@@ -195,9 +195,9 @@ func Current() *Document {
 			"40001": "serialization_failure",
 			"0A000": "feature_not_supported",
 			"42601": "syntax_error",
-			"42P01": "undefined_table",
-			"42703": "undefined_column",
 			"25P02": "in_failed_sql_transaction",
+			"08P01": "protocol_violation (managed proxy: TLS required)",
+			"53300": "too_many_connections (managed proxy: organization quota)",
 			"XX000": "internal_error",
 		},