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>

app/main.py

@@ -0,0 +1,45 @@
+"""FastAPI 진입점: 정적 자산 마운트, 라우터 등록, 헬스체크.
+
+화면용 라우트는 JSON 이 아니라 HTML(전체 페이지 또는 조각)을 반환한다(스펙 §7).
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import httpx
+from fastapi import Depends, FastAPI, Request
+from fastapi.responses import HTMLResponse
+from fastapi.staticfiles import StaticFiles
+
+# 테스트 호환을 위해 re-export (tests 가 app.main.get_pulp_client 를 override 함)
+from .deps import get_pulp_client, templates
+from .pulp_client import PulpClient
+from .routes import dashboard
+
+BASE_DIR = Path(__file__).resolve().parent
+
+app = FastAPI(title="Pulp 패치 관리 콘솔")
+app.mount("/static", StaticFiles(directory=str(BASE_DIR / "static")), name="static")
+app.include_router(dashboard.router)
+
+__all__ = ["app", "get_pulp_client"]
+
+
+@app.get("/healthz", response_class=HTMLResponse)
+def healthz(
+    request: Request, pulp: PulpClient = Depends(get_pulp_client)
+) -> HTMLResponse:
+    """Pulp status 프록시 → 연결 상태 배지 조각."""
+    try:
+        pulp.status()
+        online, detail = True, "Pulp 연결됨"
+    except httpx.HTTPError as exc:
+        online, detail = False, f"Pulp 연결 실패: {exc}"
+
+    return templates.TemplateResponse(
+        request,
+        "partials/health.html",
+        {"online": online, "detail": detail},
+        status_code=200 if online else 503,
+    )