add toke cleanup

src/main/java/com/ddf/vodsystem/repositories/TokenFamilyRepository.java

@@ -2,9 +2,29 @@ package com.ddf.vodsystem.repositories;
 
 import com.ddf.vodsystem.entities.TokenFamily;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Modifying;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
+import java.time.Instant;
+
 @Repository
 public interface TokenFamilyRepository extends JpaRepository<TokenFamily, Long> {
+    /**
+     * Deletes families that can no longer be refreshed: revoked, expired, or with every refresh
+     * token expired. Their refresh tokens are removed by the {@code ON DELETE CASCADE} foreign key.
+     *
+     * @return the number of families deleted
+     */
+    @Modifying
+    @Query("""
+            DELETE FROM TokenFamily f
+            WHERE f.revokedAt IS NOT NULL
+               OR f.expiresAt <= ?1
+               OR NOT EXISTS (
+                   SELECT 1 FROM RefreshToken r
+                   WHERE r.tokenFamily = f AND r.expiresAt > ?1
+               )
+            """)
+    int deleteDead(Instant now);
 }

src/main/java/com/ddf/vodsystem/security/TokenService.java

@@ -7,6 +7,9 @@ import com.ddf.vodsystem.entities.User;
 import com.ddf.vodsystem.exceptions.NotAuthenticated;
 import com.ddf.vodsystem.repositories.RefreshTokenRepository;
 import com.ddf.vodsystem.repositories.TokenFamilyRepository;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -28,6 +31,7 @@ import java.util.Optional;
  */
 @Service
 public class TokenService {
+    private static final Logger logger = LoggerFactory.getLogger(TokenService.class);
     private static final SecureRandom RNG = new SecureRandom();
     private static final HexFormat HEX = HexFormat.of();
 
@@ -192,6 +196,19 @@ public class TokenService {
         }
     }
 
+    /**
+     * Scheduled cleanup that deletes token families that can no longer be refreshed, along with all
+     * their refresh tokens.
+     * <p>
+     * Runs hourly. Used tokens in live families are kept, since reuse detection needs them.
+     */
+    @Scheduled(fixedDelay = 3_600_000)
+    @Transactional
+    public void deleteDeadSessions() {
+        int deleted = tokenFamilyRepository.deleteDead(Instant.now(clock));
+        if (deleted > 0) logger.info("Deleted {} dead token families", deleted);
+    }
+
     /**
      * Result of a successful {@link #rotate(String)}.
      *