Fix memory leaks in pfs_reopen_file_for_writing and clean_uploads_for_task

pfs.c: encsymkey from pcryptofolder_filencoder_key_get was freed on all
error paths in pfs_reopen_file_for_writing but not on the success path
that returns 1 after ppagecache_copy_to_file_locked.

pfsupload.c: fr from psql_fetchall_int was never freed in
clean_uploads_for_task; add pmem_free after the upload loop.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pclsync/pfs.c

@@ -2240,6 +2240,7 @@ pfs_reopen_file_for_writing(psync_openfile_t *of) {
       }
     }
     of->currentsize = of->initialsize;
+    pmem_free(PMEM_SUBSYS_OTHER, encsymkey);
     return 1;
   }
   cr = pfs_task_add_modified_file(of->currentfolder, of->currentname,

pclsync/pfsupload.c

@@ -318,6 +318,7 @@ static int clean_uploads_for_task(psock_t *api, psync_uploadid_t taskid) {
     } else
       pmem_free(PMEM_SUBSYS_UPLOAD, res);
   }
+  pmem_free(PMEM_SUBSYS_UPLOAD, fr);
   sql = psql_prepare("DELETE FROM fstaskupload WHERE fstaskid=?");
   psql_bind_uint(sql, 1, taskid);
   psql_run_free(sql);