https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/refs/heads/master/maintenance/tables.sql
ipblocks_restrictions

Note that:
`ir_type` is either 1 or 2, shown as `page` or `namespace` to ease understanding
`ir_value` can only be an int, meaning that it cannot hold the action as a string
Multiple rows for a single block with multiple restrictions

Proposed implementation:
ActionRestriction, like for namespace / page

type: 3
ir_value - constant mapping with string to int, more added by hook (for thanks)

ActionRestriction::ACTION_CREATE_VALUE => 1
ActionRestriction::ACTION_UPLOAD_VALUE => 2
ActionRestriction::ACTION_MOVE_VALUE => 3

run hook

ACTION_THANK_VALUE = 101

Hook requires that no values override existing mapping
Values 1-100 are reserved for core

+-----------+-----------+----------+
| ir_ipb_id | type      | ir_value |
+-----------+-----------+----------+
|   9562223 | action    |        1 |
|   9562223 | action    |        2 |
|   9563237 | action    |      101 |
+-----------+-----------+----------+

^ 1 block from creating and uploading, and another block from thanks