Entry point to ritual initiation: Coordinator vs Subscription

[cygnusv]

I don't think there's really a correct vs incorrect way here, but IMO doing this from the Subscription will simplify some things, and conceptually makes the Coordinator more of a protocol-oriented contract (which is the idea, anyway).

If we change it to the Subscription:

• Adopters will only interact with Subscriptions and AllowList contracts
• Coordinator will only initiate a ritual if the Subscriptions was previously approved as a FeeModel, which is currently gatekeeped by the DAO Council
• We can remove the initiator role from Coordinator, and even the whole concept of permissioned phase, since rituals can only be initiated from approved subscriptions.

If we leave it as is:

• Adopters will pay to the Subscription, but interact with the Coordinator
• DAO Council will have to separately approve the subscription as FeeModel and the adopter as initiator.

[cygnusv]

We agreed to:

• Leave the entry point in the Coordinator
• Remove the initiator role from Coordinator