chore: remove local soak/memlab run output committed to main

.gitignore

@@ -70,3 +70,10 @@ __pycache__/
 # Local soak-leg outputs (uploaded as CI artifacts, never committed)
 soak-results/
 soak-results-query-leak/
+# ...and ANY ad-hoc run directory at the repo root. The two exact names above did
+# not match hand-named runs, so 13 soak directories and 4 memlab files (78 files
+# of logs and CSVs) were committed to main by accident in 7808eee. Root-anchored
+# so nothing under scripts/ or tests/ is affected — scripts/soak-legs.sh and
+# scripts/soak-test.sh stay tracked.
+/soak*/
+/memlab-*