fleet/ohm + patches/driver/bes2600/queue-pending-record-lock-bh-danctnix: bundle besser#18 fix into the migration

Pulls the besser#18 lockdep fix (originally on
noether/bes2600-pending-record-lock-bh / PR #30) into this PR so the
ohm migration ships a single self-consistent pkgrel that contains all
three goal components: kernel-agent flow + Patch I + besser#18 fix
(plus the GCC 15 SCS Makefile workaround, no-op while SCS=n).

ohm.yaml includes now resolve to 4 patches:
  1. driver/bes2600/cumulative-c5x-danctnix/             (148 149 B)
  2. driver/bes2600/scan-filter-5ghz-danctnix/           (  7 735 B)
  3. arch/arm64/xor-neon-ffixed-x18-scs-build-fix-danctnix/ (1 562 B)
  4. driver/bes2600/queue-pending-record-lock-bh-danctnix/  (5 258 B)
  ----
  cumulative.patch                                       (162 704 B)
  b2sum 0eb091ddaba4a8f1c3c2a78eb8c621cdc6e6dfed6c43f7dac03e508a05b...

Trailer-strip applied to the besser#18 patch source for the same
reason as the SCS patch — it's now the last in the concatenated
cumulative, and patch(1) errors on the orphan '-- \n2.54.0\n' EOF
sentinel. Same gotcha documented in 84734ba.

PR #30 (the standalone besser#18 mirror PR) becomes superfluous
once this lands; close it as 'bundled into #28'.

fleet/ohm.yaml

@@ -49,6 +49,9 @@ includes:
   # (current ohm setting). Kept in the manifest for the day SCS gets
   # re-enabled. See reference_arm64_scs_arm_neon_gcc15 memory.
   - arch/arm64/xor-neon-ffixed-x18-scs-build-fix-danctnix/
+  # close besser#18 — pending_record_lock SOFTIRQ-safe -> -unsafe inversion.
+  # Mirror of marfrit/bes2600-dkms#11 (d95453c). 5-site spin_lock -> _bh.
+  - driver/bes2600/queue-pending-record-lock-bh-danctnix/
 
 # Explicitly NOT included (decision logged):
 #   - debian-copyright-fsf-address: Debian packaging metadata, not kernel