chore: ignore .directory; track the bare-metal run files of 3 to 8 October

One doe-<arch>-<time>.csv is written by each QEMU boot; the 96 from the
boots of steps 6 to 6d were untracked.  Committed so that the tree is
clean before step 6e begins: this commit is its rollback point.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitignore

@@ -74,3 +74,4 @@ tools/kconfig/.qconf.*
 # tools/capsule-reserved.txt (human-authored) and tools/patches/ (decision
 # record) are NOT ignored — those are tracked deliberately.
 /tools/capsule-claims.txt
+/.directory