fed-sx-m2: add follower_graph + delivery loads to 4 downstream tests

Step 7c made outbox depend on follower_graph + delivery, breaking
four tests that didn't load those modules. Background gate
revealed the failures after 7c had already been pushed.

Loads added:
  auto_accept.sh        — epoch 12: delivery (follower_graph
                          was already loaded at epoch 10)
  nx_kernel_multi.sh    — epochs 5+6: follower_graph + delivery
                          (existing modules shifted: outbox 5->7,
                          nx_kernel 6->8). Check 6 -> check 8.
  http_publish.sh       — epochs 100+101: follower_graph + delivery
                          (high epoch numbers to avoid collision
                          with test epochs at 10+)
  http_publish_fold.sh  — epochs 100+101: same pattern

All four green at 9/9, 26/26, 10/10, 10/10. No behaviour change
in outbox or downstream code; pure test-setup follow-up to 7c.

Conformance 761/761 (confirmed post-7c).

next/tests/auto_accept.sh

@@ -58,6 +58,8 @@ cat > "$TMPFILE" <<EPOCHS
 (eval "(get (erlang-load-module (file-read \"next/kernel/follower_graph.erl\")) :name)")
 (epoch 11)
 (eval "(get (erlang-load-module (file-read \"next/kernel/http_server.erl\")) :name)")
+(epoch 12)
+(eval "(get (erlang-load-module (file-read \"next/kernel/delivery.erl\")) :name)")
 
 ;; auto_accept on: Follow ingestion advances alice's outbox tip (Accept published)
 (epoch 20)

next/tests/http_publish.sh

@@ -48,6 +48,10 @@ cat > "$TMPFILE" <<EPOCHS
 (eval "(get (erlang-load-module (file-read \"next/kernel/log.erl\")) :name)")
 (epoch 5)
 (eval "(get (erlang-load-module (file-read \"next/kernel/pipeline.erl\")) :name)")
+(epoch 100)
+(eval "(get (erlang-load-module (file-read \"next/kernel/follower_graph.erl\")) :name)")
+(epoch 101)
+(eval "(get (erlang-load-module (file-read \"next/kernel/delivery.erl\")) :name)")
 (epoch 6)
 (eval "(get (erlang-load-module (file-read \"next/kernel/outbox.erl\")) :name)")
 (epoch 7)

next/tests/http_publish_fold.sh

@@ -54,6 +54,10 @@ cat > "$TMPFILE" <<EPOCHS
 (eval "(get (erlang-load-module (file-read \"next/kernel/nx_kernel.erl\")) :name)")
 (epoch 9)
 (eval "(get (erlang-load-module (file-read \"next/kernel/http_server.erl\")) :name)")
+(epoch 100)
+(eval "(get (erlang-load-module (file-read \"next/kernel/follower_graph.erl\")) :name)")
+(epoch 101)
+(eval "(get (erlang-load-module (file-read \"next/kernel/delivery.erl\")) :name)")
 
 ;; Single authorized POST advances both projection counters
 (epoch 10)

next/tests/nx_kernel_multi.sh

@@ -41,8 +41,12 @@ cat > "$TMPFILE" <<EPOCHS
 (epoch 4)
 (eval "(get (erlang-load-module (file-read \"next/kernel/pipeline.erl\")) :name)")
 (epoch 5)
-(eval "(get (erlang-load-module (file-read \"next/kernel/outbox.erl\")) :name)")
+(eval "(get (erlang-load-module (file-read \"next/kernel/follower_graph.erl\")) :name)")
 (epoch 6)
+(eval "(get (erlang-load-module (file-read \"next/kernel/delivery.erl\")) :name)")
+(epoch 7)
+(eval "(get (erlang-load-module (file-read \"next/kernel/outbox.erl\")) :name)")
+(epoch 8)
 (eval "(get (erlang-load-module (file-read \"next/kernel/nx_kernel.erl\")) :name)")
 
 ;; new/0 returns kernel with 0 actors
@@ -172,7 +176,7 @@ check() {
   fi
 }
 
-check  6  "nx_kernel module loaded"            "nx_kernel"
+check  8  "nx_kernel module loaded"            "nx_kernel"
 check 10  "new/0 -> 0 actors"                  "0"
 check 11  "new/0 -> next_actor_seq = 1"        "1"
 check 12  "new/0 actor_id = nil"               "true"