feat: FastAPI console with dashboard, Pulp client, healthz (stages 0-1)

- config: PULP_* env + 사내 CA(verify=) 대응
- pulp_client: Basic Auth get/post/patch, status/list_repos/get_version
- BFF 라우트: GET / (대시보드), GET /repos (조각), GET /healthz
- views: Pulp JSON → 표시 모델 (GPG 검증 배지 3단계, 요약 집계)
- HTMX + Jinja 템플릿, vendored pico.css/htmx.js (CDN 의존 0)
- 브라우저는 Pulp 직접 호출 안 함 — 모두 BFF 경유 (스펙 §2)
- 테스트: pulp_client(respx), 라우트(dependency_overrides), views 순수함수

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/conftest.py

@@ -0,0 +1,18 @@
+import pytest
+
+from app.config import get_settings
+
+PULP_TEST_URL = "http://pulp.test"
+
+
+@pytest.fixture(autouse=True)
+def _settings_env(monkeypatch):
+    """모든 테스트를 알려진 Pulp base_url 로 고정하고 settings 캐시를 초기화."""
+    monkeypatch.setenv("PULP_BASE_URL", PULP_TEST_URL)
+    monkeypatch.setenv("PULP_USERNAME", "admin")
+    monkeypatch.setenv("PULP_PASSWORD", "secret")
+    monkeypatch.setenv("PULP_VERIFY_TLS", "false")
+    monkeypatch.setenv("PULP_CA_FILE", "")
+    get_settings.cache_clear()
+    yield
+    get_settings.cache_clear()