Update database paths and fix foreign key references across coordinator API

- Change SQLite database path from `/home/oib/windsurf/aitbc/data/` to `/opt/data/`
- Fix foreign key references to use correct table names (users, wallets, gpu_registry)
- Replace governance router with new governance and community routers
- Add multi-modal RL router to main application
- Simplify DEPLOYMENT_READINESS_REPORT.md to focus on production deployment status
- Update governance router with decentralized DAO voting

test/contracts/MockZKVerifier.sol

@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.19;
+
+contract MockZKVerifier {
+    function verifyPerformanceProof(
+        uint256,
+        uint256,
+        uint256,
+        uint256,
+        uint256,
+        bytes memory
+    ) external pure returns (bool) {
+        return true;
+    }
+}