feat(workers): add activate/deactivate [NET-587]

[justprosh]

Description

Provide an API to activate and deactivate workers.
Deactivation stops all spells (sets empty trigger configs) and causes all incoming particles to that worker to be dropped.
Activation starts only installation-spell, which will start all of the others.
Activation and deactivation only allowed for the peer itself (i.e., decider spell) and management peer id.

Motivation

We need to pause deals in case of insufficient funds.

Proposed Changes

Added builtins:

service Worker:
  activate(deal_id: string)
  deactivate(deal_id: string)
  is_active(deal_id: string) -> bool

Additional Notes

• KeyManager refactoring
  • store keypairs and worker info separately
  • update worker status without locking everything
  • run key_manager methods in blocking pool
• DEPRECATE Worker.get_peer_id
• Make deal_id REQUIRED for all Worker operations

Checklist

• The code follows the project's coding conventions and style guidelines.
• All tests related to the changes have passed successfully.
• Documentation has been updated to reflect the changes (if applicable).
• All new and existing unit tests have passed.
• I have self-reviewed my code and ensured its quality.
• I have added/updated necessary comments to aid understanding.

Reviewer Checklist

• Code has been reviewed for quality and adherence to guidelines.
• Tests have been reviewed and are sufficient to validate the changes.
• Documentation has been reviewed and is up to date.
• Any questions or concerns have been addressed.

[linear]

NET-587 Activate/deactivate deals [workers]

• stop spells
• drop particles