Refacto du code coté Python, java et coté angular afin de mieux séparer les responsabilité et d'avoir moins de répétitivité dans le code.

Mise en place de tests unitaires coté Python et Angular
Mise en place de la couverture de test directement dans le workflow : le programme ne build pas si jamais un test échoue
Passage en v0.16.2 en conséquence

brain/tests/test_embedding_adapters.py

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+"""Tests des adapters d'embeddings (Mistral cloud + Ollama local)."""
+from __future__ import annotations
+
+import json
+
+import httpx
+import pytest
+import respx
+
+from app.application.embeddings import EmbeddingError
+from app.core.config import Settings
+from app.infrastructure.mistral_embedding_adapter import MistralEmbeddingProvider
+from app.infrastructure.ollama_embedding_adapter import OllamaEmbeddingProvider
+
+_MISTRAL = "https://api.mistral.ai/v1/embeddings"
+_OLLAMA = "http://ollama:11434/api/embed"
+
+
+def _settings(**kw) -> Settings:
+    base = dict(_env_file=None, llm_timeout_seconds=30, ollama_base_url="http://ollama:11434")
+    base.update(kw)
+    return Settings(**base)
+
+
+# --- Mistral -------------------------------------------------------------------
+
+def test_mistral_missing_key_raises_at_construction():
+    with pytest.raises(EmbeddingError):
+        MistralEmbeddingProvider(_settings(mistral_api_key=""))
+
+
+async def test_mistral_empty_texts_short_circuits():
+    svc = MistralEmbeddingProvider(_settings(mistral_api_key="k"))
+    assert await svc.embed([]) == []
+
+
+@respx.mock
+async def test_mistral_returns_vectors():
+    respx.post(_MISTRAL).mock(return_value=httpx.Response(200, json={
+        "data": [{"embedding": [0.1, 0.2]}, {"embedding": [0.3, 0.4]}]
+    }))
+    svc = MistralEmbeddingProvider(_settings(mistral_api_key="k", mistral_embedding_model="mistral-embed"))
+    vectors = await svc.embed(["texte un", "texte deux"])
+    assert vectors == [[0.1, 0.2], [0.3, 0.4]]
+
+
+@respx.mock
+async def test_mistral_http_error_raises():
+    respx.post(_MISTRAL).mock(return_value=httpx.Response(429, text="rate limit"))
+    svc = MistralEmbeddingProvider(_settings(mistral_api_key="k"))
+    with pytest.raises(EmbeddingError) as exc:
+        await svc.embed(["x"])
+    assert "429" in str(exc.value)
+
+
+@respx.mock
+async def test_mistral_size_mismatch_raises():
+    respx.post(_MISTRAL).mock(return_value=httpx.Response(200, json={"data": [{"embedding": [0.1]}]}))
+    svc = MistralEmbeddingProvider(_settings(mistral_api_key="k"))
+    with pytest.raises(EmbeddingError):
+        await svc.embed(["a", "b"])  # 2 demandés, 1 reçu
+
+
+# --- Ollama --------------------------------------------------------------------
+
+async def test_ollama_empty_texts_short_circuits():
+    svc = OllamaEmbeddingProvider(_settings(ollama_embedding_model="nomic-embed-text"))
+    assert await svc.embed([]) == []
+
+
+@respx.mock
+async def test_ollama_returns_vectors():
+    respx.post(_OLLAMA).mock(return_value=httpx.Response(200, json={"embeddings": [[0.1], [0.2]]}))
+    svc = OllamaEmbeddingProvider(_settings(ollama_embedding_model="mxbai-embed-large"))
+    assert await svc.embed(["a", "b"]) == [[0.1], [0.2]]
+
+
+@respx.mock
+async def test_ollama_applies_nomic_task_prefix():
+    route = respx.post(_OLLAMA).mock(return_value=httpx.Response(200, json={"embeddings": [[0.0]]}))
+    svc = OllamaEmbeddingProvider(_settings(ollama_embedding_model="nomic-embed-text"))
+    await svc.embed(["question ?"], kind="query")
+    sent = json.loads(route.calls.last.request.content)["input"]
+    assert sent == ["search_query: question ?"]
+
+
+@respx.mock
+async def test_ollama_no_prefix_for_non_nomic_model():
+    route = respx.post(_OLLAMA).mock(return_value=httpx.Response(200, json={"embeddings": [[0.0]]}))
+    svc = OllamaEmbeddingProvider(_settings(ollama_embedding_model="mxbai-embed-large"))
+    await svc.embed(["doc"], kind="document")
+    sent = json.loads(route.calls.last.request.content)["input"]
+    assert sent == ["doc"]
+
+
+@respx.mock
+async def test_ollama_http_error_mentions_pull_hint():
+    respx.post(_OLLAMA).mock(return_value=httpx.Response(404, text="model not found"))
+    svc = OllamaEmbeddingProvider(_settings(ollama_embedding_model="nomic-embed-text"))
+    with pytest.raises(EmbeddingError) as exc:
+        await svc.embed(["x"])
+    assert "ollama pull" in str(exc.value)