[Docs] Add risks & misbehavior sub-section to on-chain actors (#862)

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## Summary

Adds "Risks & Misbehavior" sub-section to the "Protocol" > "Pocket
Network Actors" > "On-Chain Actors" section:


![image](https://github.com/user-attachments/assets/23e35b6e-bbfa-4704-ab6c-3e7b2253c41b)

## Issue

- #612

## Type of change

Select one or more from the following:

- [ ] New feature, functionality or library
- [ ] Consensus breaking; add the `consensus-breaking` label if so. See
#791 for details
- [ ] Bug fix
- [ ] Code health or cleanup
- [x] Documentation
- [ ] Other (specify)

## Testing

- [x] **Documentation**: `make docusaurus_start`; only needed if you
make doc changes
- [ ] **Unit Tests**: `make go_develop_and_test`
- [ ] **LocalNet E2E Tests**: `make test_e2e`
- [ ] **DevNet E2E Tests**: Add the `devnet-test-e2e` label to the PR.

## Sanity Checklist

- [ ] I have tested my changes using the available tooling
- [ ] I have commented my code
- [ ] I have performed a self-review of my own code; both comments &
source code
- [ ] I create and reference any new tickets, if applicable
- [ ] I have left TODOs throughout the codebase, if applicable

---------

Co-authored-by: Daniel Olshansky <[email protected]>

docusaurus/docs/protocol/actors/actors.md

@@ -7,6 +7,7 @@ sidebar_position: 1
 
 - [Overview](#overview)
 - [On-Chain Actors](#on-chain-actors)
+  - [Risks \& Misbehavior](#risks--misbehavior)
 - [Off-Chain Actors](#off-chain-actors)
 
 ## Overview
@@ -55,6 +56,37 @@ They can thought of as a `record`, a `registration` or a piece of `state` at a
 certain point in time. They have an `address`, an `account`, a `balance` and often
 also have a `stake`.
 
+### Risks & Misbehavior
+
+:::warning
+This is an open work in progress and an active area of research.
+:::
+
+```mermaid
+mindmap
+    (On-Chain Actors)
+        Gateway
+            Risks
+                Intentional overservicing
+                Off-chain only?
+            Misbehavior
+                Low volume exploit
+                On-chain, there are few/any? expectations of gateway actors; basically a registry to track gateways and application delegations
+                On-chain, we cannot robustly distinguish requests sent by gateways from those sent by applications acting sovereignly
+        Application
+            Risks
+                Insufficient funds to pay for services received
+                Intentional overservicing
+            Misbehavior
+                Low volume exploit
+        Supplier
+            Risks
+                Service/quality degredation
+            Misbehavior
+                No or low quality responses to valid requests for service
+                Invalid/missing proofs
+```
+
 ## Off-Chain Actors
 
 Off-Chain actors are all the operators that make up Pocket Network. They are the