TemplateState object attributes return enums for the keys

[Petro31]

The problem

When using templates, state object attributes return a dictionary where the keys are enums. This breaks existing templates that output to variables via automation variable sections, script variable sections, template entity attributes, and mqtt attributes. E.g.

variables:
  my_attributes: "{{ states.weather.home.attributes }}"

now populates my_attributes with a string instead, where before it populated my_attributes with a dictionary. This is because the keys for attributes on some domains (light, weather) have been converted to enums in these PRs:

#174604
#174528

from this arch discussion home-assistant/architecture#1406 and this epic home-assistant/epics#104

What version of Home Assistant Core has the issue?

2026.7.0b0

What was the last working version of Home Assistant Core?

2026.6.4

What type of installation are you running?

Home Assistant OS

Integration causing the issue

No response

Link to integration documentation on our website

No response

Diagnostics information

No response

Example YAML snippet

Anything in the logs that might be useful for us?

Additional information

No response