Rename MCP server and test client files

Renamed 'my_mcp_server.py' to 'mcp_server.py' and replaced 'my_mcp_test_client.py' with 'mcp_test_client.py' to standardize file naming. Updated the test client to reference the new server filename.

Author: Fr4nc3

src/backend/v3/mcp_server/my_mcp_server.py renamed to src/backend/v3/mcp_server/mcp_server.py

@@ -0,0 +1,16 @@
+import asyncio
+from fastmcp import Client
+
+client = Client("mcp_server.py")
+
+
+async def call_tool(name: str):
+    async with client:
+        result = await client.call_tool(
+            "send_welcome_email",
+            {"employee_name": name, "email_address": f"{name.lower()}@example.com"},
+        )
+        print(result)
+
+
+asyncio.run(call_tool("Ford"))