�� Automatic code style fixes

Code style adjustments

Fix publishable check

Bug in aggregations: the check was always applied to current page.
Instead it should check the pid of the current result row.

use composing instead of inheritance to access DB

this should avoid two connections to the database

Update queries for new SQLiteDB class

register IS_PUBLISHED on our own database connection

Ideally the plugin shouldn't open it's own connection, but rely on the
main struct connection. But since our helper inherits from the struct
help

register IS_PUBLISHED on our own database connection

Ideally the plugin shouldn't open it's own connection, but rely on the
main struct connection. But since our helper inherits from the struct
helper it is treated as a different class (not as the same as struct).
So we need to ensure that our function is registered on the correct
connection.

Why this has worked before is unclear. With the devel branch of the
sqlite plugin it fails.

In the future this should be refactored correctly.

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added more docblocks and some reformatting

Update assignments when patterns are added

move all constants to their own class

make it easier to check permissions for the current user

Register custom sqlite function via event

Remove obsolete helper

Working check whether current user may see not only published revisions

Admin interface and required code cleanup

Use a regular struct schema instead of custom table