fix(lint): resolve E600, E605 in csrf and delegation, apply auto-fixes
- csrf: flatten suite to single tuple, add test_csrf.mli, update runner
- delegation: split monolithic test.ml into test_name, test_trie,
test_policy, test_asn_ext, test_extract with .mli files
- delegation auto-fixes: E331 renames (make→v, make_of_path→of_path,
name→label)
- fdir auto-fixes: E105 narrow catch-all, E331 _stats→stats, add Logs