[feature] New ws endpoint for all all Location broadcast

[dee077]

Checklist

• I have read the OpenWISP Contributing Guidelines.
• I have manually tested the changes proposed in this pull request.
• I have written new test cases for new code and/or updated existing tests for changes to existing code.
• I have updated the documentation.

Reference to Existing Issue

Closes #1157.

Description of Changes

• Made a new ws endpoint location/all from base django-loci clases with updated user permissions.

Screen Recording

Screencast.from.2025-11-13.02-20-06.webm

[coveralls]

coverage: 98.549% (-0.06%) from 98.607%
when pulling 5a91a30 on feature/1157-new-ws-endpoint-for-all-location
into faec934 on master.

[pandafy]

Suggested change

	if (
	result
	and not user.is_superuser
	and not user.is_manager(location.organization)
	):
	return False
	return result
	return result and (user.is_superuser or user.is_manager(location.organization))

[dee077]

I can make these changes, but then in LocationBroadcast above, we have the same logic written in 2 different ways!
We can change both or keep it as it is
Let me know which is better

[dee077]

Updates

• Added organization specific websocket groups so that authorized users can connect to the common location endpoint while receiving updates only for the organizations they manage unlike, the single-location endpoint enforces stricter authorization by rejecting the connection entirely if the user is not an admin or manager of the location’s organization.
• Added tests

Build on top of openwisp/django-loci#193