chore(memory): flush runtime memories and promote managed skills

Memory-file flush for the dotfiles-deploy session with the blankpad admin
credential scrubbed to a placeholder; sessions transcripts untracked
(gitignored) since harness transcripts can carry raw secrets.
Managed skills: command-center-dotfiles-import, ssh-fish-host-remote-exec,
stash-supersession-audit-before-drop.

agent/memories/--home-dank-.omp--/skills/omp-deploy-workflow/templates/nvidia-workarounds.conf

@@ -0,0 +1,2 @@
+# Fix nvidia-modeset semaphore deadlock with niri
+nvidia-modeset modeset=1