fix(rust): send reward notices, and keep a downed line's credit rule (W21, W4)

W21: the permission push named its fields one by one and left out
`notices`, so no kit reward, lend or give ever told its player
anything (D333). The body is now built by `pushBody`, which carries
every field the payload has; a test fails if a payload field is
dropped again.

W4: a downed patrol helicopter, Chinook or Bradley is stored with the
credit rule in force when it arrived, and the feed reads that stamp.
Before, the line re-credited past rows with the server's current rule
while the Rotorbane/Tankbreaker counts kept the old one. Rows stored
before this change keep today's reading.

PLAN_LAST_FIXES.md stage 1.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

server/permSync.js

@@ -314,13 +314,7 @@ async function syncOne(server, { authored, sync, state, force, policy = 'auto-ad
     held: planned.hold.size,
   })
 
-  const result = await sidecar.permSync(server, {
-    setId: desired.hash,
-    groups: withExpect(held.payload.groups, pushed),
-    grants: held.payload.grants,
-    credits: held.payload.credits,
-    retire,
-  })
+  const result = await sidecar.permSync(server, pushBody(desired.hash, held.payload, pushed, retire))
 
   if (!result.ok) {
     await failed(server, { reason, error: result.status, desiredHash: desired.hash, sync, bootId, wipeId })
@@ -358,6 +352,23 @@ async function syncOne(server, { authored, sync, state, force, policy = 'auto-ad
   return 'ok'
 }
 
+/**
+ * The sync as the wire carries it: every field of the built payload, the
+ * groups with their style `expect`s, and what to retire. `notices` rides here
+ * too (D333) — the push once named its fields one by one and left it out, so
+ * no reward message ever reached the game (W21).
+ */
+function pushBody(setId, payload, pushed, retire) {
+  return {
+    setId,
+    groups: withExpect(payload.groups, pushed),
+    grants: payload.grants,
+    credits: payload.credits,
+    notices: payload.notices,
+    retire,
+  }
+}
+
 /**
  * The groups as the wire carries them: each style field with the value this
  * site last pushed to THIS server (`expect`), or null for one it never has.
@@ -526,6 +537,7 @@ module.exports = {
   syncOne,
   reasonToSync,
   applyReport,
+  pushBody,
   withExpect,
   styleRetirements,
   withLock,