feat(realestate): 내부 인증 + naver 워커 targets 엔드포인트 + nginx internal 블록

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EqCYBhvTcdeCTUDX3RhWx9

realestate-lab/app/internal_router.py

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+"""naver-fetch 워커 내부 계약: targets 조회 + listings ingest."""
+import os
+import logging
+from fastapi import APIRouter, Depends
+
+from .auth import verify_internal_key
+from .db import get_listing_criteria
+from .lawd_codes import naver_cortar
+
+logger = logging.getLogger("realestate-lab")
+router = APIRouter()
+
+NAVER_PAGE_LIMIT = int(os.getenv("NAVER_PAGE_LIMIT", "2"))
+
+
+@router.get("/api/internal/realestate/targets", dependencies=[Depends(verify_internal_key)])
+def listing_targets():
+    crit = get_listing_criteria()
+    dongs = []
+    for d in crit.get("dongs", []):
+        code = naver_cortar(d)
+        if not code:
+            logger.warning("naver cortarNo 매핑 없음 — 대상 제외: %s", d)
+            continue
+        dongs.append({"dong": d, "cortar_no": code})
+    return {"dongs": dongs, "deal_types": crit.get("deal_types", []),
+            "page_limit": NAVER_PAGE_LIMIT}