closes: #10968

## Description

- **feat: clean up upon last attest**
- **feat: check conflicting evidence before quorum**

- chore: clean up promise handling
- replace debug() with trace() in PacketTools
- **docs: TxFeed does not inspect evidence**
- **test: self disagreement**

### Security Considerations

slightly stricter check

### Scaling Considerations

reduces growth of TxFeed's `pending` store (which would always have the third operator submission)

### Documentation Considerations
some new docs

### Testing Considerations
some new tests

### Upgrade Considerations

Fully backwards compatible