refactor: improve development workflow and code quality

- Add Spanish documentation for AGENTS.md and README.md
- Add pytest to main dependencies and taskipy for dev tasks
- Clean up unused imports across codebase
- Fix default config values for local development
- Update test fixtures to use standard pytest

tests/conftest.py

@@ -1,5 +1,4 @@
 import pytest
-import pytest_asyncio
 from unittest.mock import MagicMock, patch
 from fastmcp import Client
 
@@ -19,7 +18,7 @@ def mcp_server():
     return mcp
 
 
-@pytest_asyncio.fixture
+@pytest.fixture
 async def mcp_client(mcp_server):
     async with Client(mcp_server) as client:
         yield client

tests/test_customer.py

@@ -1,7 +1,5 @@
 import pytest
-import pytest_asyncio
 from unittest.mock import MagicMock, patch
-import json
 
 import sys
 from pathlib import Path

tests/test_server.py

@@ -1,8 +1,5 @@
 import pytest
-import pytest_asyncio
 from unittest.mock import MagicMock, patch
-import json
-from contextlib import asynccontextmanager
 
 import sys
 from pathlib import Path