Retire the bloom-storm chaos scenario from both CI runners

The scenario guarded a real regression: a mid-chain tree update that
changed neither root nor depth leaking downstream as a sustained bloom
announce storm. But it was never once run against the regressed binary,
and its per-node ceiling was inferred from a post-mortem harness that no
longer exists in the tree. On the only surviving regressed measurement
the tail node's rate scales to roughly 7 sends per 30s, well under the
scenario's ceiling of 40, so it was never established that the assertion
could fire on its own bug class. The ceiling is also uniform per node,
calibrated against the flap target that is legitimately busy rather than
against the tail where the storm actually shows.

This removes coverage rather than relocating it, unlike the two earlier
retirements above it, and the comment in ci-local.sh records that gap
explicitly. The scenario, its README, the link_swap sim primitive and the
mesh-lab dispatch all stay on disk, so it remains runnable by hand.

Parity holds at 24 legs a side. The parity guard was break-checked by
re-adding the GitHub leg alone, which correctly reported the asymmetry.

testing/ci-local.sh

@@ -32,7 +32,6 @@
 #   nat-lan, nostr-publish-consume, stun-faults,
 #   chaos-churn-mixed-10, chaos-ethernet-mesh,
 #   chaos-ethernet-only, chaos-tcp-mesh, chaos-congestion-stress,
-#   chaos-bloom-storm,
 #   sidecar, dns-resolver, deb-install
 #
 # Opt-in (require --with-tor; depend on live Tor network):
@@ -141,7 +140,6 @@ CHAOS_SUITES=(
     "ethernet-only ethernet-only"
     "tcp-mesh tcp-mesh"
     "congestion-stress congestion-stress"
-    "bloom-storm bloom-storm"
 )
 # Scenarios retired 2026-07-23 because their subject was a pure decision the
 # Docker harness could not test reliably, now covered by sans-IO unit tests:
@@ -164,6 +162,24 @@ CHAOS_SUITES=(
 #     plus end-to-end datagram delivery (src/node/tests/forwarding.rs). Real-
 #     UDP convergence smoke still runs via static-mesh and the other chaos
 #     scenarios' baseline assertions, so no Docker coverage is lost.
+#
+# Retired 2026-07-26 for a third reason — the guard's power was never
+# established, and unlike the two blocks above this one DOES lose coverage:
+#   - bloom-storm: guarded the regression in 0caef2a (fixed by 4cdf382), where
+#     a mid-chain tree update changing neither root nor depth leaked downstream
+#     as a sustained bloom announce storm. It was never once run against that
+#     regressed binary; its ceiling was inferred from a separate post-mortem
+#     harness that no longer exists in the tree. On the only regressed
+#     measurement that survives, the tail node's rate scales to ~7 sends per
+#     30s, well under the scenario's ceiling of 40 — so it is not established
+#     that the assertion could ever have fired on its own bug class. The
+#     ceiling is also uniform per node, calibrated against the flap target
+#     (legitimately ~24) while the storm's actual signature is at the tail,
+#     which sits at 0 on fixed code. COVERAGE GAP: nothing now exercises
+#     downstream containment of a mid-chain ancestor swap. The scenario, its
+#     README, the link_swap sim primitive and the mesh-lab dispatch all stay
+#     on disk and it remains runnable by hand via
+#     testing/chaos/scripts/chaos.sh bloom-storm.
 GATEWAY_SUITES=(gateway)
 SIDECAR_SUITES=(sidecar)
 FIREWALL_SUITES=(firewall)