Registry[T] is the brick that all named collections build on:
- map[string]T + mutex + optional locking
- Set/Get/Has/Names/List/Each/Lock/Delete
- c.Registry("services"), c.Registry("actions"), c.Registry("drives")
Resolves Issues 6 + 12:
- serviceRegistry/commandRegistry become exported, embed Registry[T]
- IPC is safe to expose — reads from registry, doesn't own write path
- Registration goes through c.Action(), locking through c.Registry().Lock()
Typed accessors (c.Service, c.Action, c.Drive) are sugar over
c.Registry(name).Get(). Universal query layer on top.
Replaces 5 separate map+mutex+lock implementations with one primitive.
Co-Authored-By: Virgil <virgil@lethean.io>
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