feat: Implement full Execution Protocol API with validation, execution, and reputation endpoints

- POST /api/v1/validate - Validates trading opportunities with risk scoring
- POST /api/v1/execute - Executes approved decisions with approval tokens
- GET /api/v1/reputation/:agent - Returns agent reputation scores
- GET /api/v1/stats - System-wide statistics
- POST /ep/validate - Legacy backward-compatible endpoint
- Fee calculation: max(0.5%, 0.01 ETH)
- State persistence to JSON file
- Updated render.yaml for Node.js service deployment

Fixes: /ep/validate endpoint now operational
Revenue: Ready for Virtuals ACP integration

Author: Achilles

data/ep-state.json

@@ -0,0 +1,35 @@
+{
+  "decisions": {
+    "d-1773212171478": {
+      "decision_id": "d-1773212171478",
+      "status": "approved",
+      "confidence_score": 0.87,
+      "risk_level": "medium",
+      "max_allocation": 1000,
+      "fee": {
+        "amount_eth": "5.0000",
+        "amount_usd": "12500.00",
+        "basis_points": 50
+      },
+      "attestation_uid": null,
+      "timestamp": "2026-03-11T06:56:11.478Z",
+      "agent_id": "test-agent-001",
+      "opportunity": {
+        "type": "hyperliquid_funding",
+        "asset": "ETH",
+        "expected_return": 0.05,
+        "confidence": 0.87,
+        "max_capital": 1000
+      },
+      "executed": false
+    }
+  },
+  "attestations": [],
+  "agents": {},
+  "stats": {
+    "totalValidations": 1,
+    "totalExecutions": 0,
+    "totalFeesCollected": 0,
+    "totalVolume": 0
+  }
+}

render.yaml

@@ -1,27 +1,13 @@
 services:
-  - type: static
+  - type: web
     name: execution-protocol
-    runtime: static
-    buildCommand: echo "Static site ready"
-    staticPublishPath: ./docs-site
-    routes:
-      - type: rewrite
-        source: /docs
-        destination: /docs/index.html
-      - type: rewrite
-        source: /api
-        destination: /api/index.html
-      - type: rewrite
-        source: /contracts
-        destination: /contracts/index.html
-      - type: rewrite
-        source: /integration
-        destination: /integration/index.html
-      - type: rewrite
-        source: /virtuals
-        destination: /virtuals/index.html
-    headers:
-      - path: /*
-        name: Cache-Control
-        value: public, max-age=3600
+    env: node
+    buildCommand: npm install
+    startCommand: node server.js
+    envVars:
+      - key: NODE_ENV
+        value: production
+      - key: PORT
+        value: 10000
+    healthCheckPath: /api/v1/stats
     autoDeploy: true