chore: remove outdated documentation and reference files

- Remove debugging service documentation (DEBUgging_SERVICES.md)
- Remove development logs policy and quick reference guides
- Remove E2E test creation summary
- Remove gift certificate example file
- Remove GitHub pull summary documentation

tests/testing/register_test_clients.py

@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+"""Register test clients for payment integration testing"""
+
+import asyncio
+import httpx
+import json
+
+# Configuration
+COORDINATOR_URL = "http://127.0.0.1:8000/v1"
+CLIENT_KEY = "test_client_key_123"
+MINER_KEY = "${MINER_API_KEY}"
+
+async def register_client():
+    """Register a test client"""
+    async with httpx.AsyncClient() as client:
+        # Register client
+        response = await client.post(
+            f"{COORDINATOR_URL}/clients/register",
+            headers={"X-API-Key": CLIENT_KEY},
+            json={"name": "Test Client", "description": "Client for payment testing"}
+        )
+        print(f"Client registration: {response.status_code}")
+        if response.status_code not in [200, 201]:
+            print(f"Response: {response.text}")
+        else:
+            print("✓ Test client registered successfully")
+
+async def register_miner():
+    """Register a test miner"""
+    async with httpx.AsyncClient() as client:
+        # Register miner
+        response = await client.post(
+            f"{COORDINATOR_URL}/miners/register",
+            headers={"X-API-Key": MINER_KEY},
+            json={
+                "name": "Test Miner",
+                "description": "Miner for payment testing",
+                "capacity": 100,
+                "price_per_hour": 0.1,
+                "hardware": {"gpu": "RTX 4090", "memory": "24GB"}
+            }
+        )
+        print(f"Miner registration: {response.status_code}")
+        if response.status_code not in [200, 201]:
+            print(f"Response: {response.text}")
+        else:
+            print("✓ Test miner registered successfully")
+
+async def main():
+    print("=== Registering Test Clients ===")
+    await register_client()
+    await register_miner()
+    print("\n✅ Test clients registered successfully!")
+
+if __name__ == "__main__":
+    asyncio.run(main())