feat(llm): añade MockProvider determinista con 3 escenarios canónicos

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/unit/test_llm_mock.py

@@ -0,0 +1,36 @@
+"""Tests del proveedor LLM mock determinista."""
+
+import json
+
+import pytest
+
+from agentforge_core.llm.base import Message
+from agentforge_core.llm.mock import MockProvider
+
+
+@pytest.fixture
+def provider() -> MockProvider:
+    return MockProvider()
+
+
+async def test_mock_provider_es_determinista(provider: MockProvider) -> None:
+    msgs = [Message(role="user", content="caída registros SIP")]
+    r1 = await provider.complete(msgs)
+    r2 = await provider.complete(msgs)
+    assert r1.content == r2.content
+
+
+async def test_mock_provider_devuelve_json_valido(provider: MockProvider) -> None:
+    msgs = [Message(role="user", content="degradación MOS pool SBC")]
+    r = await provider.complete(msgs)
+    parsed = json.loads(r.content)
+    assert "severity" in parsed
+    assert "proposed_actions" in parsed
+    assert isinstance(parsed["proposed_actions"], list)
+
+
+async def test_mock_provider_respuesta_canonica_si_no_match(provider: MockProvider) -> None:
+    msgs = [Message(role="user", content="texto random sin patrón")]
+    r = await provider.complete(msgs)
+    parsed = json.loads(r.content)
+    assert parsed["severity"] in {"low", "medium", "high", "critical"}