chore: remove outdated documentation and reference files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/test_coordinator.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+"""
+Test GPU registration with mock coordinator
+"""
+
+import httpx
+import json
+
+COORDINATOR_URL = "http://localhost:8090"
+
+# Test available endpoints
+print("=== Testing Mock Coordinator Endpoints ===")
+endpoints = [
+    "/",
+    "/health",
+    "/metrics",
+    "/miners/register",
+    "/miners/list",
+    "/marketplace/offers"
+]
+
+for endpoint in endpoints:
+    try:
+        response = httpx.get(f"{COORDINATOR_URL}{endpoint}", timeout=5)
+        print(f"{endpoint}: {response.status_code}")
+        if response.status_code == 200 and response.text:
+            try:
+                data = response.json()
+                print(f"  Response: {json.dumps(data, indent=2)[:200]}...")
+            except:
+                print(f"  Response: {response.text[:100]}...")
+    except Exception as e:
+        print(f"{endpoint}: Error - {e}")
+
+print("\n=== Checking OpenAPI Spec ===")
+try:
+    response = httpx.get(f"{COORDINATOR_URL}/openapi.json", timeout=5)
+    if response.status_code == 200:
+        openapi = response.json()
+        paths = list(openapi.get("paths", {}).keys())
+        print(f"Available endpoints: {paths}")
+    else:
+        print(f"OpenAPI not available: {response.status_code}")
+except Exception as e:
+    print(f"Error getting OpenAPI: {e}")