feat: Use blueprint 0.58.1 isItemInt flag for integer list items

Number list items now map to int when the blueprint marks them with the
new isItemInt flag, restoring List[int] for supported_code_lengths. All
integer types now match the pre-refactor generated output.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011TdqYTYvyrK8rrR7FL1Aax

Author: claude

codegen/lib/python-type.ts

@@ -2,16 +2,13 @@
 
 import type { Parameter, Property } from '@seamapi/blueprint'
 
-type ScalarFormat = Exclude<(Parameter | Property)['format'], 'list'>
+type ScalarFormat = Exclude<(Parameter | Property)['format'], 'list' | 'number'>
 
-type ListItemFormat = Extract<
-  Parameter | Property,
-  { format: 'list' }
->['itemFormat']
+type ListItem = Extract<Parameter | Property, { format: 'list' }>
 
 export const mapParameterToPythonType = (parameter: Parameter): string => {
   if (parameter.format === 'list') {
-    return `List[${mapListItemFormatToPythonType(parameter.itemFormat)}]`
+    return `List[${mapListItemToPythonType(parameter)}]`
   }
 
   if (parameter.format === 'number') {
@@ -23,7 +20,7 @@ export const mapParameterToPythonType = (parameter: Parameter): string => {
 
 export const mapPropertyToPythonType = (property: Property): string => {
   if (property.format === 'list') {
-    return `List[${mapListItemFormatToPythonType(property.itemFormat)}]`
+    return `List[${mapListItemToPythonType(property)}]`
   }
 
   if (property.format === 'number') {
@@ -39,25 +36,29 @@ export const mapPropertyToPythonType = (property: Property): string => {
   return mapScalarFormatToPythonType(property.format)
 }
 
+const mapListItemToPythonType = (list: ListItem): string => {
+  if (list.itemFormat === 'number') {
+    return list.isItemInt ? 'int' : 'float'
+  }
+
+  if (list.itemFormat === 'discriminated_object') {
+    return 'Dict[str, Any]'
+  }
+
+  return mapScalarFormatToPythonType(list.itemFormat)
+}
+
 const mapScalarFormatToPythonType = (format: ScalarFormat): string => {
   switch (format) {
     case 'string':
     case 'datetime':
     case 'id':
     case 'enum':
       return 'str'
-    // List items have no isInt flag, so numbers in lists stay floats.
-    case 'number':
-      return 'float'
     case 'boolean':
       return 'bool'
     case 'record':
     case 'object':
       return 'Dict[str, Any]'
   }
 }
-
-const mapListItemFormatToPythonType = (itemFormat: ListItemFormat): string =>
-  itemFormat === 'discriminated_object'
-    ? 'Dict[str, Any]'
-    : mapScalarFormatToPythonType(itemFormat)