feat(api): MCP, OpenAPI & Dynamic Introspection

New Features:
- API endpoints now support comprehensive input validation with detailed error responses via Pydantic models.
- OpenAPI specification endpoint (/openapi.json) and interactive Swagger UI documentation (/docs) now available for API discovery.
- Enhanced MCP session lifecycle management with create, retrieve, and delete operations.
- Network diagnostic tools: traceroute, nslookup, NMAP scanning, and network topology viewing exposed via API.
- Device search, filtering by status (including 'offline'), and bulk operations (copy, delete, update).
- Wake-on-LAN functionality for remote device management.
- Added dynamic tool disablement and status reporting.

Bug Fixes:
- Fixed get_tools_status in registry to correctly return boolean values instead of None for enabled tools.
- Improved error handling for invalid API inputs with standardized validation responses.
- Fixed OPTIONS request handling for cross-origin requests.

Refactoring:
- Significant refactoring of api_server_start.py to use decorator-based validation (@validate_request).

test/unit/test_device_status_mappings.py

@@ -0,0 +1,20 @@
+import pytest
+from pydantic import ValidationError
+
+from server.api_server.openapi.schemas import DeviceListRequest
+from server.db.db_helper import get_device_condition_by_status
+
+
+def test_device_list_request_accepts_offline():
+    req = DeviceListRequest(status="offline")
+    assert req.status == "offline"
+
+
+def test_get_device_condition_by_status_offline():
+    cond = get_device_condition_by_status("offline")
+    assert "devPresentLastScan=0" in cond and "devIsArchived=0" in cond
+
+
+def test_device_list_request_rejects_unknown_status():
+    with pytest.raises(ValidationError):
+        DeviceListRequest(status="my_devices")