Skip agent 000 in GET /agents/summary/os-status endpoints

[mcarmona99]

Related issue
#6502

Hi team,

In this PR, I have changed the GET /agents/summary/os and GET /agents/summary/status endpoints behavior in order to not consider the agent 000. Not considering 000 will fix the error reported in the issue related.

• Testing that the endpoints are not returning 000 information:

GET /agents/summary/status:

Response before changes:

{
  "data": {
    "active": 9,
    "disconnected": 0,
    "never_connected": 4,
    "pending": 0,
    "total": 13
  },
  "error": 0
}

Response after changes:

{
  "data": {
    "active": 8,
    "disconnected": 0,
    "never_connected": 4,
    "pending": 0,
    "total": 12
  },
  "error": 0
}

GET /agents/summary/os:

I have deleted all agents so the only agent we have is 000.

sqlite> select os_platform,id from agent;
ubuntu|0

Endpoint response:

{
  "data": {
    "affected_items": [],
    "total_affected_items": 0,
    "total_failed_items": 0,
    "failed_items": []
  },
  "message": "Could not get the operative system of the agents",
  "error": 0
}

• API integration tests:

test_agents_GET_endpoints.tavern.yaml 
	 90 passed, 97 warnings
	 
test_rbac_black_agents_endpoints.tavern.yaml 
	 39 passed, 41 warnings

test_rbac_white_agents_endpoints.tavern.yaml 
	 39 passed, 41 warnings

• Unit tests:

framework/wazuh/core/tests/test_agent.py
======================= 187 passed, 11 warnings in 3.33s =======================

framework/wazuh/tests/test_agent.py
======================= 89 passed, 11 warnings in 13.56s =======================

Regards,
Manuel.

[davidjiglesias]

We also need to change code and tests for overview endpoint to not include 000.
Update changelog.

[mcarmona99]

• Now the endpoint GET /overview/agents skip the agent with id 000. Changed the endpoint docstring to NumpyDoc.

• Update CHANGELOG.md.

• API integration test results:

test_overview_endpoints.tavern.yaml 
	 1 passed, 3 warnings

test_rbac_black_overview_endpoints.tavern.yaml 
	 1 passed, 3 warnings

test_rbac_white_overview_endpoints.tavern.yaml 
	 1 passed, 3 warnings

• Unit test results:

framework/wazuh/core/tests/test_agent.py
================== 187 passed, 11 warnings in 15.43s ==================

framework/wazuh/tests/test_agent.py
================== 90 passed, 11 warnings in 3.45s ==================