[NMPIP] Real-World Insurance Vault: Bringing Insurance Returns to Crypto Capital

## Summary The following is a proposal by the DAO R&D Team to launch a USDC-denominated yield bearing vault under the wider Nexus Mutual umbrella. The vault would source underlying returns from providing solvency capital and reserves off-chain to back regulated insurance policies. The vault is set up to be an allocate-and-forget style deposit: - rolling up at a fixed baseline yield (above typical blue-chip USDC yields available in the market), protected by Nexus Mutual cover, - ability to...