Adding methods to in-body `methods:{}` on `export const model` doesn't re-register

Description

For user-defined model types (files using export const model = { type, version, methods: { ... }, ... }), adding a new entry to the methods: object is not picked up by swamp at runtime — the registered type keeps the old method set. Identical functionality works correctly when added in a separate export const extension file.

Steps to reproduce

1. Start with a repo using a user-defined model type, e.g. extensions/models/mongodb_atlas_access_list.ts with export const model = { type: "@john_yq2i/mongodb-atlas-access-list", version: "2026.04.15.3", methods: { revoke_ip, grant_permanent_ip, grant_temporary_ip } }.
2. Add a new method list inside the methods: object. Save.
3. rm -rf ~/.swamp/repos/<repoId>/bundles/*/mongodb_atlas_access_list.js to force a rebundle.
4. Run swamp model method run swamp-club-atlas list.
5. Separately, bump version to 2026.04.17.1 and add an upgrade stub — still no change.
6. Finally, delete the in-body list method and add an identical method via a new file extensions/models/mongodb_atlas_access_list_list.ts with export const extension = { type: "@john_yq2i/mongodb-atlas-access-list", methods: [{ list: { ... } }] }.

Actual behavior

Steps 1–5: swamp model type describe @john_yq2i/mongodb-atlas-access-list --json keeps showing only the original 3 methods. swamp model method run fails with Unknown method 'list' ... Available methods: revoke_ip, grant_permanent_ip, grant_temporary_ip. The regenerated bundle also lacks the list method despite it being in the source file.

Step 6: works immediately. swamp model type describe now shows 4 methods; the method runs fine.

Expected behavior

Adding a method in either location — in-body methods: on export const model, or via export const extension — should behave the same way. Both should pick up edits from source on the next run (after bundle invalidation). Having to move code between files to make a method "stick" is surprising.

Environment

• swamp: 20260414.220725.0-sha.e36340de on darwin aarch64
• Model type version: 2026.04.15.3