wal tests: move test.toml comments to script, remove empty test.toml files

Co-authored-by: Isaac

Author: denik

acceptance/bundle/deploy/wal/chain-3-jobs/script

@@ -1,3 +1,5 @@
+# Linear chain: job_01 -> job_02 -> job_03
+# Let first 2 jobs/create succeed, then kill on the 3rd
 kill_after.py "POST /api/2.2/jobs/create" 2 1
 
 echo "=== First deploy (crashes on job_03) ==="

acceptance/bundle/deploy/wal/chain-3-jobs/test.toml

@@ -1,3 +1,6 @@
+# WAL recovery after real crash. First deploy creates job_a then crashes.
+# Second deploy recovers from WAL and completes successfully.
+# job_b depends on job_a, so jobs/get is called after job_a's SaveState.
 kill_after.py "GET /api/2.2/jobs/get" 0 1
 
 echo "=== First deploy (crashes after job_a create, before job_b) ==="