fix: resolve memory leaks in arkilian-dlq and ensure database handles are closed in hydration logic

Author: FridayCandour

src/hydration.c

@@ -867,8 +867,8 @@ int arkilian_hydrate(const char *db_path,
     sqlite3 *ldb = NULL;
     if (sqlite3_open_v2(db_path, &ldb, SQLITE_OPEN_READONLY, NULL) == SQLITE_OK) {
       pre_local_lsn = read_last_applied_lsn(ldb);
-      sqlite3_close(ldb);
     }
+    sqlite3_close(ldb);
     if (pre_local_lsn > plan.baseline_lsn) {
       fprintf(stderr,
               "arkilian: hydration refused — local DB is at LSN %lld but the "
@@ -908,8 +908,8 @@ int arkilian_hydrate(const char *db_path,
         goto hydrate_done;
       }
       sqlite3_exec(ldb, "ROLLBACK;", NULL, NULL, NULL);
-      sqlite3_close(ldb);
     }
+    sqlite3_close(ldb);
   }
 
   // ── Phase 1: Download baseline snapshot ──

tools/arkilian-dlq.c

@@ -170,6 +170,8 @@ static int cmd_replay(const char *path, long long only_id, int dry_run) {
   }
   if (rc != SQLITE_OK) {
     fprintf(stderr, "replay prepare failed: %s\n", sqlite3_errmsg(db));
+    sqlite3_free(replay_sql);
+    sqlite3_free(cleanup_sql);
     sqlite3_close(db);
     return 1;
   }
@@ -187,6 +189,9 @@ static int cmd_replay(const char *path, long long only_id, int dry_run) {
   if (rc == SQLITE_OK && sqlite3_step(st) == SQLITE_DONE) removed = sqlite3_changes(db);
   sqlite3_finalize(st);
 
+  sqlite3_free(replay_sql);
+  sqlite3_free(cleanup_sql);
+
   printf("replayed %d row(s) to _pending_backup, removed %d from _dead_backup\n",
          replayed, removed);
   sqlite3_close(db);