fix(deploy): health check 401 대응 + PressureCollector 중복 방지

- deploy.yml: health check에서 HTTP 401/403도 정상 기동으로 판정 (인증 필요 엔드포인트)
- health check timeout 30초 → 60초
- PressureCollector: save 전 existsByStationAndReadingTime으로 중복 확인
  (JPA unique constraint 예외 → Hibernate 세션 오염 방지)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -112,10 +112,11 @@ jobs:
           echo "--- Restarting kcg-backend ---"
           systemctl restart kcg-backend
 
-          # 기동 확인 (최대 30초)
-          for i in $(seq 1 30); do
-            if curl -sf http://localhost:8080/api/aircraft > /dev/null 2>&1; then
-              echo "Backend started successfully (${i}s)"
+          # 기동 확인 (최대 60초, 401=인증필요=정상 기동)
+          for i in $(seq 1 60); do
+            HTTP=$(curl -s -o /dev/null -w '%{http_code}' http://localhost:8080/api/aircraft 2>/dev/null)
+            if [ "$HTTP" = "200" ] || [ "$HTTP" = "401" ] || [ "$HTTP" = "403" ]; then
+              echo "Backend started successfully (${i}s, HTTP $HTTP)"
               exit 0
             fi
             sleep 1

backend/src/main/java/gc/mda/kcg/collector/sensor/PressureCollector.java

@@ -91,19 +91,16 @@ public class PressureCollector {
             try {
                 // Open-Meteo 시간 형식: "2026-03-18T07:00" (Z 없음) → Z 추가
                 Instant readingTime = OffsetDateTime.parse(timeStr + "Z").toInstant();
-                try {
-                    repository.save(PressureReading.builder()
-                            .station(station)
-                            .lat(lat)
-                            .lng(lng)
-                            .pressureHpa(pressure)
-                            .readingTime(readingTime)
-                            .collectedAt(now)
-                            .build());
-                    saved++;
-                } catch (Exception ignored) {
-                    // unique constraint violation = 이미 존재, 무시
-                }
+                if (repository.existsByStationAndReadingTime(station, readingTime)) continue;
+                repository.save(PressureReading.builder()
+                        .station(station)
+                        .lat(lat)
+                        .lng(lng)
+                        .pressureHpa(pressure)
+                        .readingTime(readingTime)
+                        .collectedAt(now)
+                        .build());
+                saved++;
             } catch (DateTimeParseException e) {
                 log.debug("기압 시간 파싱 실패: {}", timeStr);
             }

backend/src/main/java/gc/mda/kcg/domain/sensor/PressureReadingRepository.java

@@ -6,6 +6,7 @@ import java.time.Instant;
 import java.util.List;
 
 public interface PressureReadingRepository extends JpaRepository<PressureReading, Long> {
+    boolean existsByStationAndReadingTime(String station, Instant readingTime);
     List<PressureReading> findByStationAndReadingTimeAfterOrderByReadingTimeAsc(String station, Instant since);
     List<PressureReading> findByReadingTimeAfterOrderByReadingTimeAsc(Instant since);
 }