v1.3.0

Changed

• Bumped the django-admin-rest-api floor to ^1.5.0, which broadens
  the form-spec legacy-iframe detection to request-driven custom views
  (a change_view/add_view override that renders a non-standard template,
  not just the change_form_template attribute). No MCP code changes — the
  wire adapter forwards rest-api's payload unchanged — so admin.form_spec
  now surfaces renderer: "legacy-iframe" for those views too, letting a
  caller know the form is not machine-driveable instead of inventing field
  values (#70).

Added

• Job cross-repo fixture + end-to-end tests. The test project now
  carries the same JobAdmin fixture (request-driven custom change_view)
  and mounts the legacy admin, so an integration test asserts the MCP wire
  forwards both answers unchanged: Path A (? absent) → form-spec with the
  large-textarea metadata widget; Path B (query={"run_custom": "1"}) →
  renderer: "legacy-iframe" with the legacy URL preserved.