addressed locking issue

backend/src/main/java/com/thughari/jobtrackerpro/entity/User.java

@@ -49,6 +49,9 @@ public class User {
 
 	@Column(name = "gmail_sync_in_progress")
 	private Boolean gmailSyncInProgress = false;
+
+	@Column(name = "gmail_sync_started_at")
+	private LocalDateTime gmailSyncStartedAt;
 
 	@Column(name = "gmail_connected")
 	private Boolean gmailConnected = false;

backend/src/main/java/com/thughari/jobtrackerpro/repo/UserRepository.java

@@ -22,8 +22,8 @@ public interface UserRepository extends JpaRepository<User, UUID> {
 
 	@Modifying
 	@Transactional
-	@Query("UPDATE User u SET u.gmailSyncInProgress = true WHERE u.email = :email AND u.gmailSyncInProgress = false")
-	int claimSyncLock(@Param("email") String email);
+	@Query("UPDATE User u SET u.gmailSyncInProgress = true, u.gmailSyncStartedAt = :now WHERE u.email = :email AND (u.gmailSyncInProgress = false OR u.gmailSyncStartedAt < :expiry)")
+	int claimSyncLock(@Param("email") String email, @Param("now") LocalDateTime now, @Param("expiry") LocalDateTime expiry);
 
 	@Modifying
 	@Transactional

backend/src/main/java/com/thughari/jobtrackerpro/service/GmailIntegrationService.java

@@ -125,7 +125,10 @@ public void connectAndSetupPush(String authCode, String email) throws Exception
     @Async("taskExecutor")
     public void initiateManualSync(String email) {
 
-    	int updatedRows = userRepository.claimSyncLock(email);
+    	LocalDateTime now = LocalDateTime.now();
+        LocalDateTime expiryThreshold = now.minusMinutes(15);
+
+    	int updatedRows = userRepository.claimSyncLock(email, now, expiryThreshold);
 
         if (updatedRows == 0) {
             return; 

backend/src/main/java/com/thughari/jobtrackerpro/service/GmailWebhookService.java

@@ -50,8 +50,11 @@ public GmailWebhookService(GeminiService geminiService, JobService jobService, U
     @Async("taskExecutor")
     public void processHistorySync(String userEmail) {
         final String email = userEmail.toLowerCase();
+
+        LocalDateTime now = LocalDateTime.now();
+        LocalDateTime expiryThreshold = now.minusMinutes(15);
 
-        int updatedRows = userRepository.claimSyncLock(email);
+        int updatedRows = userRepository.claimSyncLock(email, now, expiryThreshold);
         if (updatedRows == 0) return;
 
         cacheEvictService.evictAllForUser(email);

frontend/angular.json

@@ -25,7 +25,8 @@
                 "glob": "**/*",
                 "input": "public"
               },
-              "src/404.html"
+              "src/404.html",
+              "src/CNAME"
             ],
             "styles": [
               "src/styles.css"

frontend/src/CNAME

@@ -0,0 +1 @@
+jobtrackerpro.in