Expose key Vault Factory economic data via subscription

[Tartuffo]

This data can be used in Blockchain Explorers and via sites like The Graph for the community to get key information about the state of the RUN Protocol components.

From our meeting on Feb 22, here is the data we want to expose from the Vault Factory:

Per Contract (Director object)

• Governance parameters, contract terms, fees governed
• Allowed collateral types
• Current reward pool (fees collected so far)
• Number and amount of shortfall

Per Collateral (Manager object)

• Governance parameters, including interest rate, liquidation ratio, liquidation penalty per collateral, current debt limit governed
• Current debt limit governed
• Number of vaults
• Total outstanding debt (vaultKit publicNotifiers.asset)
• Total collateral held
• Compounded interest (vaultKit publicNotifiers.asset)
• Liquidation strategy governed
• Liquidation state (how much is currently being liquidated)
  1. Collateral being sold
  2. Amount sold so far
  3. Proceeds so far

Per Vault

• Debt (debtSnapshot.debt)
• Collateral (locked)
• Interest snapshot (debtSnapshot.interest)
• Status (open, closed, liquidating, liquidated) vaultState

Use existing notifiers except for values that have high change frequency.