* Generate default_roles_permissions.js from a live server snapshot
Replace the hand-maintained default_roles_permissions.js with a
generated file. The generator (scripts/default_permissions_generator/)
boots a real app.NewServer() against a temporary database created by
storetest.MakeSqlSettings, lets all schema and app-level migrations run
naturally, then snapshots the resulting Roles table into the JS file.
This eliminates the drift risk of the previous hand-maintained map:
new migrations are picked up automatically because the same server
initialization path is used here as in production.
The CI job gets a postgres service and sets IS_CI=true so the generator
uses the same host-switching logic as the rest of the test suite.
Locally, make start-docker provides the postgres instance.
* Address CodeRabbit feedback: pin checkout SHA, add permissions, add .PHONY entries
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