API: endpoint /schema (#78)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/api/conftest.py

@@ -10,3 +10,27 @@ def temp_db(tmp_path, monkeypatch):
 
     tokens_db.init_schema(db_path)
     return db_path
+
+
+@pytest.fixture
+def api_client(monkeypatch, tmp_path):
+    """Client Flask test avec USERS_DB_PATH éphémère et blueprint API monté."""
+    db_path = tmp_path / "users.test.sqlite"
+    monkeypatch.setenv("USERS_DB_PATH", str(db_path))
+    from flask import Flask
+
+    from src.api import init_api, tokens_db
+
+    tokens_db.init_schema(db_path)
+    server = Flask(__name__)
+    init_api(server)
+    return server.test_client(), db_path
+
+
+@pytest.fixture
+def valid_token_header(api_client):
+    from src.api import tokens_db
+
+    _, db_path = api_client
+    token, _ = tokens_db.create_token(db_path, "test-token")
+    return {"Authorization": f"Bearer {token}"}