Fix missing V0331SeedModelPy references (#54500)

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Closes #ISSUE

Release Notes:

- N/A or Added/Fixed/Improved ...

crates/zeta_prompt/src/zeta_prompt.rs

@@ -244,6 +244,7 @@ pub fn format_zeta_prompt(input: &ZetaPromptInput, format: ZetaFormat) -> Option
         | ZetaFormat::V0306SeedMultiRegions
         | ZetaFormat::V0316SeedMultiRegions
         | ZetaFormat::V0317SeedMultiRegions
+        | ZetaFormat::V0331SeedCoderModelPy
         | ZetaFormat::V0318SeedMultiRegions => 4096,
         ZetaFormat::V0327SingleFile => 16384,
     };
@@ -1036,6 +1037,7 @@ pub fn format_expected_output(
         | ZetaFormat::v0226Hashline
         | ZetaFormat::V0304VariableEdit
         | ZetaFormat::V0304SeedNoEdits
+        | ZetaFormat::V0331SeedCoderModelPy
         | ZetaFormat::V0306SeedMultiRegions => {
             let (mut result, first_hunk_offset) = if empty_patch {
                 (old_editable.clone(), None)